svelte.go

Documentation: github.com/alecthomas/chroma/v2/lexers

     1  package lexers
     2  
     3  import (
     4  	. "github.com/alecthomas/chroma/v2" // nolint
     5  )
     6  
     7  // Svelte lexer.
     8  var Svelte = Register(DelegatingLexer(HTML, MustNewLexer(
     9  	&Config{
    10  		Name:      "Svelte",
    11  		Aliases:   []string{"svelte"},
    12  		Filenames: []string{"*.svelte"},
    13  		MimeTypes: []string{"application/x-svelte"},
    14  		DotAll:    true,
    15  	},
    16  	svelteRules,
    17  )))
    18  
    19  func svelteRules() Rules {
    20  	return Rules{
    21  		"root": {
    22  			// Let HTML handle the comments, including comments containing script and style tags
    23  			{`<!--`, Other, Push("comment")},
    24  			{
    25  				// Highlight script and style tags based on lang attribute
    26  				// and allow attributes besides lang
    27  				`(<\s*(?:script|style).*?lang\s*=\s*['"])` +
    28  					`(.+?)(['"].*?>)` +
    29  					`(.+?)` +
    30  					`(<\s*/\s*(?:script|style)\s*>)`,
    31  				UsingByGroup(2, 4, Other, Other, Other, Other, Other),
    32  				nil,
    33  			},
    34  			{
    35  				// Make sure `{` is not inside script or style tags
    36  				`(?<!<\s*(?:script|style)(?:(?!(?:script|style)\s*>).)*?)` +
    37  					`{` +
    38  					`(?!(?:(?!<\s*(?:script|style)).)*?(?:script|style)\s*>)`,
    39  				Punctuation,
    40  				Push("templates"),
    41  			},
    42  			// on:submit|preventDefault
    43  			{`(?<=\s+on:\w+(?:\|\w+)*)\|(?=\w+)`, Operator, nil},
    44  			{`.+?`, Other, nil},
    45  		},
    46  		"comment": {
    47  			{`-->`, Other, Pop(1)},
    48  			{`.+?`, Other, nil},
    49  		},
    50  		"templates": {
    51  			{`}`, Punctuation, Pop(1)},
    52  			// Let TypeScript handle strings and the curly braces inside them
    53  			{`(?<!(?<!\\)\\)(['"` + "`])" + `.*?(?<!(?<!\\)\\)\1`, Using("TypeScript"), nil},
    54  			// If there is another opening curly brace push to templates again
    55  			{"{", Punctuation, Push("templates")},
    56  			{`@(debug|html)\b`, Keyword, nil},
    57  			{
    58  				`(#await)(\s+)(\w+)(\s+)(then|catch)(\s+)(\w+)`,
    59  				ByGroups(Keyword, Text, Using("TypeScript"), Text,
    60  					Keyword, Text, Using("TypeScript"),
    61  				),
    62  				nil,
    63  			},
    64  			{`(#|/)(await|each|if|key)\b`, Keyword, nil},
    65  			{`(:else)(\s+)(if)?\b`, ByGroups(Keyword, Text, Keyword), nil},
    66  			{`:(catch|then)\b`, Keyword, nil},
    67  			{`[^{}]+`, Using("TypeScript"), nil},
    68  		},
    69  	}
    70  }
    71
View as plain text