hexo/node_modules/highlight.js/lib/languages/abnf.js

83 lines
1.5 KiB
JavaScript

/*
Language: Augmented Backus-Naur Form
Author: Alex McKibben <alex@nullscope.net>
Website: https://tools.ietf.org/html/rfc5234
Audit: 2020
*/
/** @type LanguageFn */
function abnf(hljs) {
const regex = hljs.regex;
const IDENT = /^[a-zA-Z][a-zA-Z0-9-]*/;
const KEYWORDS = [
"ALPHA",
"BIT",
"CHAR",
"CR",
"CRLF",
"CTL",
"DIGIT",
"DQUOTE",
"HEXDIG",
"HTAB",
"LF",
"LWSP",
"OCTET",
"SP",
"VCHAR",
"WSP"
];
const COMMENT = hljs.COMMENT(/;/, /$/);
const TERMINAL_BINARY = {
scope: "symbol",
match: /%b[0-1]+(-[0-1]+|(\.[0-1]+)+)?/
};
const TERMINAL_DECIMAL = {
scope: "symbol",
match: /%d[0-9]+(-[0-9]+|(\.[0-9]+)+)?/
};
const TERMINAL_HEXADECIMAL = {
scope: "symbol",
match: /%x[0-9A-F]+(-[0-9A-F]+|(\.[0-9A-F]+)+)?/
};
const CASE_SENSITIVITY = {
scope: "symbol",
match: /%[si](?=".*")/
};
const RULE_DECLARATION = {
scope: "attribute",
match: regex.concat(IDENT, /(?=\s*=)/)
};
const ASSIGNMENT = {
scope: "operator",
match: /=\/?/
};
return {
name: 'Augmented Backus-Naur Form',
illegal: /[!@#$^&',?+~`|:]/,
keywords: KEYWORDS,
contains: [
ASSIGNMENT,
RULE_DECLARATION,
COMMENT,
TERMINAL_BINARY,
TERMINAL_DECIMAL,
TERMINAL_HEXADECIMAL,
CASE_SENSITIVITY,
hljs.QUOTE_STRING_MODE,
hljs.NUMBER_MODE
]
};
}
module.exports = abnf;