refractor/lang/parser.js

Lightweight, robust, elegant virtual syntax highlighting using Prism

'use strict';

module.exports = parser;
parser.displayName = 'parser';
parser.aliases = [];
function parser(Prism) {
  Prism.languages.parser = Prism.languages.extend('markup', {
    keyword: {
      pattern: /(^|[^^])(?:\^(?:case|eval|for|if|switch|throw)\b|@(?:BASE|CLASS|GET(?:_DEFAULT)?|OPTIONS|SET_DEFAULT|USE)\b)/,
      lookbehind: true
    },
    variable: {
      pattern: /(^|[^^])\B\$(?:\w+|(?=[.{]))(?:(?:\.|::?)\w+)*(?:\.|::?)?/,
      lookbehind: true,
      inside: {
        punctuation: /\.|:+/
      }
    },
    function: {
      pattern: /(^|[^^])\B[@^]\w+(?:(?:\.|::?)\w+)*(?:\.|::?)?/,
      lookbehind: true,
      inside: {
        keyword: {
          pattern: /(^@)(?:GET_|SET_)/,
          lookbehind: true
        },
        punctuation: /\.|:+/
      }
    },
    escape: {
      pattern: /\^(?:[$^;@()\[\]{}"':]|#[a-f\d]*)/i,
      alias: 'builtin'
    },
    punctuation: /[\[\](){};]/
  });
  Prism.languages.insertBefore('parser', 'keyword', {
    'parser-comment': {
      pattern: /(\s)#.*/,
      lookbehind: true,
      alias: 'comment'
    },
    expression: {
      // Allow for 3 levels of depth
      pattern: /(^|[^^])\((?:[^()]|\((?:[^()]|\((?:[^()])*\))*\))*\)/,
      greedy: true,
      lookbehind: true,
      inside: {
        string: {
          pattern: /(^|[^^])(["'])(?:(?!\2)[^^]|\^[\s\S])*\2/,
          lookbehind: true
        },
        keyword: Prism.languages.parser.keyword,
        variable: Prism.languages.parser.variable,
        function: Prism.languages.parser.function,
        boolean: /\b(?:true|false)\b/,
        number: /\b(?:0x[a-f\d]+|\d+\.?\d*(?:e[+-]?\d+)?)\b/i,
        escape: Prism.languages.parser.escape,
        operator: /[~+*\/\\%]|!(?:\|\|?|=)?|&&?|\|\|?|==|<[<=]?|>[>=]?|-[fd]?|\b(?:def|eq|ge|gt|in|is|le|lt|ne)\b/,
        punctuation: Prism.languages.parser.punctuation
      }
    }
  });
  Prism.languages.insertBefore(
    'inside',
    'punctuation',
    {
      expression: Prism.languages.parser.expression,
      keyword: Prism.languages.parser.keyword,
      variable: Prism.languages.parser.variable,
      function: Prism.languages.parser.function,
      escape: Prism.languages.parser.escape,
      'parser-punctuation': {
        pattern: Prism.languages.parser.punctuation,
        alias: 'punctuation'
      }
    },
    Prism.languages.parser['tag'].inside['attr-value']
  );
}