paf-link/turtle.js at main · swiss/paf-link · GitHub

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/*
Language: Turtle
Author: Mark Ellis <mark.ellis@stardog.com>, Vladimir Alexiev <vladimir.alexiev@ontotext.com>
Category: common
Description: Terse RDF Triple Language for the semantic web
Website: https://www.w3.org/TR/turtle/
*/

function turtle(hljs) {
    var KEYWORDS = {
      keyword: 'base|10 prefix|10 @base|10 @prefix|10',
      literal: 'true|0 false|0',
      built_in: 'a|0'
    };

    var IRI_LITERAL = {// https://www.w3.org/TR/turtle/#grammar-production-IRIREF
      className: 'literal',
      relevance: 1, // XML tags look also like relative IRIs
      begin: /</,
      end: />/,
      illegal: /[^\x00-\x20<>"{}|^`]/, // TODO: https://www.w3.org/TR/turtle/#grammar-production-UCHAR
    };

    // https://www.w3.org/TR/turtle/#terminals
    var PN_CHARS_BASE    = 'A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD\u10000-\uEFFFF';
    var PN_CHARS_U       = PN_CHARS_BASE+'_';
    var PN_CHARS         = '-'+PN_CHARS_U+'0-9\u00B7\u0300-\u036F\u203F-\u2040';
    var BLANK_NODE_LABEL = '_:['+PN_CHARS_U+'0-9](['+PN_CHARS+'.]*['+PN_CHARS+'])?';
    var PN_PREFIX        = '['+PN_CHARS_BASE+'](['+PN_CHARS+'.]*['+PN_CHARS+'])?';
    var PERCENT          = '%[0-9A-Fa-f][0-9A-Fa-f]';
    var PN_LOCAL_ESC     = '\\\\[_~.!$&\'()*+,;=/?#@%-]';
    var PLX              = PERCENT+'|'+PN_LOCAL_ESC;
    var PNAME_NS         = '('+PN_PREFIX+')?:';
    var PN_LOCAL         = '(['+PN_CHARS_U+':0-9]|'+PLX+')(['+PN_CHARS+'.:]|'+PLX+')*(['+PN_CHARS+':]|'+PLX+')?';
    var PNAME_LN         = PNAME_NS+PN_LOCAL;
    var PNAME_NS_or_LN   = PNAME_NS+'('+PN_LOCAL+')?';

    var PNAME = {
      begin: PNAME_NS_or_LN,
      relevance: 0,
      className: 'symbol',
    };

    var BLANK_NODE = {
      begin: BLANK_NODE_LABEL,
      relevance: 10,
      className: 'template-variable',
    };

    var LANGTAG = {
      begin: /@[a-zA-Z]+([a-zA-Z0-9-]+)*/,
      className: 'type',
      relevance: 5, // also catches objectivec keywords like: @protocol, @optional
    };

    var DATATYPE =  {
      begin: '\\^\\^'+PNAME_LN,
      className: 'type',
      relevance: 10,
    };

    var TRIPLE_APOS_STRING = {
      begin: /'''/,
      end: /'''/,
      className: 'string',
      relevance: 0,
    };

    var TRIPLE_QUOTE_STRING = {
      begin: /"""/,
      end: /"""/,
      className: 'string',
      relevance: 0,
    };

    var APOS_STRING_LITERAL = JSON.parse(JSON.stringify(hljs.APOS_STRING_MODE));
    APOS_STRING_LITERAL.relevance = 0;

    var QUOTE_STRING_LITERAL = JSON.parse(JSON.stringify(hljs.QUOTE_STRING_MODE));
    QUOTE_STRING_LITERAL.relevance = 0;

    var NUMBER = JSON.parse(JSON.stringify(hljs.C_NUMBER_MODE));
    NUMBER.relevance = 0;

    return {
      case_insensitive: true,
      keywords: KEYWORDS,
      aliases: ['turtle', 'ttl', 'n3', 'ntriples'],
      contains: [
        LANGTAG,
        DATATYPE,
        IRI_LITERAL,
        BLANK_NODE,
        PNAME,
        TRIPLE_APOS_STRING, TRIPLE_QUOTE_STRING, // order matters
        APOS_STRING_LITERAL, QUOTE_STRING_LITERAL,
        NUMBER,
        hljs.HASH_COMMENT_MODE,
      ],
      exports: {
        LANGTAG: LANGTAG,
        DATATYPE: DATATYPE,
        IRI_LITERAL: IRI_LITERAL,
        BLANK_NODE: BLANK_NODE,
        PNAME: PNAME,
        TRIPLE_APOS_STRING: TRIPLE_APOS_STRING,
        TRIPLE_QUOTE_STRING: TRIPLE_QUOTE_STRING,
        APOS_STRING_LITERAL: APOS_STRING_LITERAL,
        QUOTE_STRING_LITERAL: QUOTE_STRING_LITERAL,
        NUMBER: NUMBER,
        KEYWORDS: KEYWORDS,
      }
    };
  }