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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 // Svelte lexer.
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8 var Svelte = Register(DelegatingLexer(HTML, MustNewLexer(
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9 &Config{
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10 Name: "Svelte",
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11 Aliases: []string{"svelte"},
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12 Filenames: []string{"*.svelte"},
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13 MimeTypes: []string{"application/x-svelte"},
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14 DotAll: true,
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15 },
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16 svelteRules,
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17 )))
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18
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19 func svelteRules() Rules {
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20 return Rules{
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21 "root": {
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22 // Let HTML handle the comments, including comments containing script and style tags
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23 {`<!--`, Other, Push("comment")},
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24 {
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25 // Highlight script and style tags based on lang attribute
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26 // and allow attributes besides lang
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27 `(<\s*(?:script|style).*?lang\s*=\s*['"])` +
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28 `(.+?)(['"].*?>)` +
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29 `(.+?)` +
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30 `(<\s*/\s*(?:script|style)\s*>)`,
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31 UsingByGroup(2, 4, Other, Other, Other, Other, Other),
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32 nil,
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33 },
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34 {
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35 // Make sure `{` is not inside script or style tags
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36 `(?<!<\s*(?:script|style)(?:(?!(?:script|style)\s*>).)*?)` +
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37 `{` +
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38 `(?!(?:(?!<\s*(?:script|style)).)*?(?:script|style)\s*>)`,
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39 Punctuation,
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40 Push("templates"),
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41 },
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42 // on:submit|preventDefault
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43 {`(?<=\s+on:\w+(?:\|\w+)*)\|(?=\w+)`, Operator, nil},
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44 {`.+?`, Other, nil},
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45 },
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46 "comment": {
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47 {`-->`, Other, Pop(1)},
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48 {`.+?`, Other, nil},
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49 },
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50 "templates": {
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51 {`}`, Punctuation, Pop(1)},
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52 // Let TypeScript handle strings and the curly braces inside them
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53 {`(?<!(?<!\\)\\)(['"` + "`])" + `.*?(?<!(?<!\\)\\)\1`, Using("TypeScript"), nil},
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54 // If there is another opening curly brace push to templates again
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55 {"{", Punctuation, Push("templates")},
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56 {`@(debug|html)\b`, Keyword, nil},
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57 {
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58 `(#await)(\s+)(\w+)(\s+)(then|catch)(\s+)(\w+)`,
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59 ByGroups(Keyword, Text, Using("TypeScript"), Text,
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60 Keyword, Text, Using("TypeScript"),
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61 ),
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62 nil,
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63 },
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64 {`(#|/)(await|each|if|key)\b`, Keyword, nil},
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65 {`(:else)(\s+)(if)?\b`, ByGroups(Keyword, Text, Keyword), nil},
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66 {`:(catch|then)\b`, Keyword, nil},
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67 {`[^{}]+`, Using("TypeScript"), nil},
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68 },
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69 }
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70 }
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