refractor
Version:
Lightweight, robust, elegant virtual syntax highlighting using Prism
99 lines (96 loc) • 3.24 kB
JavaScript
// @ts-nocheck
/**
* @import {Refractor} from '../lib/core.js'
*/
cue.displayName = 'cue'
cue.aliases = []
/** @param {Refractor} Prism */
export default function cue(Prism) {
;(function (Prism) {
// https://cuelang.org/docs/references/spec/
// eslint-disable-next-line regexp/strict
var stringEscape = /\\(?:(?!\2)|\2(?:[^()\r\n]|\([^()]*\)))/.source
// eslint-disable-next-line regexp/strict
var stringTypes =
/"""(?:[^\\"]|"(?!""\2)|<esc>)*"""/.source +
// eslint-disable-next-line regexp/strict
'|' +
/'''(?:[^\\']|'(?!''\2)|<esc>)*'''/.source +
// eslint-disable-next-line regexp/strict
'|' +
/"(?:[^\\\r\n"]|"(?!\2)|<esc>)*"/.source +
// eslint-disable-next-line regexp/strict
'|' +
/'(?:[^\\\r\n']|'(?!\2)|<esc>)*'/.source
var stringLiteral =
'(?:' + stringTypes.replace(/<esc>/g, stringEscape) + ')'
Prism.languages.cue = {
comment: {
pattern: /\/\/.*/,
greedy: true
},
'string-literal': {
// eslint-disable-next-line regexp/strict
pattern: RegExp(
/(^|[^#"'\\])(#*)/.source + stringLiteral + /(?!["'])\2/.source
),
lookbehind: true,
greedy: true,
inside: {
// I'm using dirty hack here. We have to know the number hashes at the start of the string somehow,
// but we can't look back. So instead, we will use a lookahead, go to the end of the string, and
// capture the hashes at the end of the string.
escape: {
pattern:
/(?=[\s\S]*["'](#*)$)\\\1(?:U[a-fA-F0-9]{1,8}|u[a-fA-F0-9]{1,4}|x[a-fA-F0-9]{1,2}|\d{2,3}|[^(])/,
greedy: true,
alias: 'string'
},
interpolation: {
pattern: /(?=[\s\S]*["'](#*)$)\\\1\([^()]*\)/,
greedy: true,
inside: {
punctuation: /^\\#*\(|\)$/,
expression: {
pattern: /[\s\S]+/,
inside: null
}
}
},
string: /[\s\S]+/
}
},
keyword: {
pattern: /(^|[^\w$])(?:for|if|import|in|let|null|package)(?![\w$])/,
lookbehind: true
},
boolean: {
pattern: /(^|[^\w$])(?:false|true)(?![\w$])/,
lookbehind: true
},
builtin: {
pattern:
/(^|[^\w$])(?:bool|bytes|float|float(?:32|64)|u?int(?:8|16|32|64|128)?|number|rune|string)(?![\w$])/,
lookbehind: true
},
attribute: {
pattern: /@[\w$]+(?=\s*\()/,
alias: 'function'
},
function: {
pattern: /(^|[^\w$])[a-z_$][\w$]*(?=\s*\()/i,
lookbehind: true
},
number: {
pattern:
/(^|[^\w$.])(?:0b[01]+(?:_[01]+)*|0o[0-7]+(?:_[0-7]+)*|0[xX][0-9A-Fa-f]+(?:_[0-9A-Fa-f]+)*|(?:\d+(?:_\d+)*(?:\.(?:\d+(?:_\d+)*)?)?|\.\d+(?:_\d+)*)(?:[eE][+-]?\d+(?:_\d+)*)?(?:[KMGTP]i?)?)(?![\w$])/,
lookbehind: true
},
operator: /\.{3}|_\|_|&&?|\|\|?|[=!]~|[<>=!]=?|[+\-*/?]/,
punctuation: /[()[\]{},.:]/
}
Prism.languages.cue[
'string-literal'
].inside.interpolation.inside.expression.inside = Prism.languages.cue
})(Prism)
}