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