refractor/lang/yaml.js

Lightweight, robust, elegant virtual syntax highlighting using Prism

'use strict';

module.exports = yaml;
yaml.displayName = 'yaml';
yaml.aliases = [];
function yaml(Prism) {
  Prism.languages.yaml = {
    scalar: {
      pattern: /([\-:]\s*(?:![^\s]+)?[ \t]*[|>])[ \t]*(?:((?:\r?\n|\r)[ \t]+)[^\r\n]+(?:\2[^\r\n]+)*)/,
      lookbehind: true,
      alias: 'string'
    },
    comment: /#.*/,
    key: {
      pattern: /(\s*(?:^|[:\-,[{\r\n?])[ \t]*(?:![^\s]+)?[ \t]*)[^\r\n{[\]},#\s]+?(?=\s*:\s)/,
      lookbehind: true,
      alias: 'atrule'
    },
    directive: {
      pattern: /(^[ \t]*)%.+/m,
      lookbehind: true,
      alias: 'important'
    },
    datetime: {
      pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)(?:\d{4}-\d\d?-\d\d?(?:[tT]|[ \t]+)\d\d?:\d{2}:\d{2}(?:\.\d*)?[ \t]*(?:Z|[-+]\d\d?(?::\d{2})?)?|\d{4}-\d{2}-\d{2}|\d\d?:\d{2}(?::\d{2}(?:\.\d*)?)?)(?=[ \t]*(?:$|,|]|}))/m,
      lookbehind: true,
      alias: 'number'
    },
    boolean: {
      pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)(?:true|false)[ \t]*(?=$|,|]|})/im,
      lookbehind: true,
      alias: 'important'
    },
    null: {
      pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)(?:null|~)[ \t]*(?=$|,|]|})/im,
      lookbehind: true,
      alias: 'important'
    },
    string: {
      pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)("|')(?:(?!\2)[^\\\r\n]|\\.)*\2(?=[ \t]*(?:$|,|]|}))/m,
      lookbehind: true,
      greedy: true
    },
    number: {
      pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)[+\-]?(?:0x[\da-f]+|0o[0-7]+|(?:\d+\.?\d*|\.?\d+)(?:e[+-]?\d+)?|\.inf|\.nan)[ \t]*(?=$|,|]|})/im,
      lookbehind: true
    },
    tag: /![^\s]+/,
    important: /[&*][\w]+/,
    punctuation: /---|[:[\]{}\-,|>?]|\.\.\./
  };
}