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71 lines
2.0 KiB
Go
71 lines
2.0 KiB
Go
package lexers
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import (
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. "github.com/alecthomas/chroma/v2" // nolint
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)
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// Svelte lexer.
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var Svelte = Register(DelegatingLexer(HTML, MustNewLexer(
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&Config{
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Name: "Svelte",
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Aliases: []string{"svelte"},
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Filenames: []string{"*.svelte"},
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MimeTypes: []string{"application/x-svelte"},
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DotAll: true,
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},
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svelteRules,
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)))
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func svelteRules() Rules {
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return Rules{
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"root": {
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// Let HTML handle the comments, including comments containing script and style tags
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{`<!--`, Other, Push("comment")},
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{
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// Highlight script and style tags based on lang attribute
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// and allow attributes besides lang
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`(<\s*(?:script|style).*?lang\s*=\s*['"])` +
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`(.+?)(['"].*?>)` +
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`(.+?)` +
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`(<\s*/\s*(?:script|style)\s*>)`,
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UsingByGroup(2, 4, Other, Other, Other, Other, Other),
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nil,
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},
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{
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// Make sure `{` is not inside script or style tags
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`(?<!<\s*(?:script|style)(?:(?!(?:script|style)\s*>).)*?)` +
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`{` +
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`(?!(?:(?!<\s*(?:script|style)).)*?(?:script|style)\s*>)`,
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Punctuation,
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Push("templates"),
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},
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// on:submit|preventDefault
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{`(?<=\s+on:\w+(?:\|\w+)*)\|(?=\w+)`, Operator, nil},
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{`.+?`, Other, nil},
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},
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"comment": {
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{`-->`, Other, Pop(1)},
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{`.+?`, Other, nil},
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},
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"templates": {
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{`}`, Punctuation, Pop(1)},
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// Let TypeScript handle strings and the curly braces inside them
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{`(?<!(?<!\\)\\)(['"` + "`])" + `.*?(?<!(?<!\\)\\)\1`, Using("TypeScript"), nil},
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// If there is another opening curly brace push to templates again
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{"{", Punctuation, Push("templates")},
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{`@(debug|html)\b`, Keyword, nil},
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{
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`(#await)(\s+)(\w+)(\s+)(then|catch)(\s+)(\w+)`,
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ByGroups(Keyword, Text, Using("TypeScript"), Text,
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Keyword, Text, Using("TypeScript"),
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),
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nil,
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},
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{`(#|/)(await|each|if|key)\b`, Keyword, nil},
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{`(:else)(\s+)(if)?\b`, ByGroups(Keyword, Text, Keyword), nil},
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{`:(catch|then)\b`, Keyword, nil},
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{`[^{}]+`, Using("TypeScript"), nil},
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},
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}
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}
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