/* **********************************************
     Begin prism-core.js
********************************************** */

var _self = (typeof window !== 'undefined')
  ? window   // if in browser
  : (
    (typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope)
      ? self // if in worker
      : {}   // if in node js
  );

/**
 * Prism: Lightweight, robust, elegant syntax highlighting
 * MIT license http://www.opensource.org/licenses/mit-license.php/
 * @author Lea Verou http://lea.verou.me
 */

var Prism = (function () {

  // Private helper vars
  var lang = /\blang(?:uage)?-([\w-]+)\b/i;
  var uniqueId = 0;

  var _ = _self.Prism = {
    manual: _self.Prism && _self.Prism.manual,
    disableWorkerMessageHandler: _self.Prism && _self.Prism.disableWorkerMessageHandler,
    util: {
      encode: function (tokens) {
        if (tokens instanceof Token) {
          return new Token(tokens.type, _.util.encode(tokens.content), tokens.alias);
        } else if (_.util.type(tokens) === 'Array') {
          return tokens.map(_.util.encode);
        } else {
          return tokens.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/\u00a0/g, ' ');
        }
      },

      type: function (o) {
        return Object.prototype.toString.call(o).slice(8, -1);
      },

      objId: function (obj) {
        if (!obj['__id']) {
          Object.defineProperty(obj, '__id', { value: ++uniqueId });
        }
        return obj['__id'];
      },

      // Deep clone a language definition (e.g. to extend it)
      clone: function (o, visited) {
        var type = _.util.type(o);
        visited = visited || {};

        switch (type) {
          case 'Object':
            if (visited[_.util.objId(o)]) {
              return visited[_.util.objId(o)];
            }
            var clone = {};
            visited[_.util.objId(o)] = clone;

            for (var key in o) {
              if (o.hasOwnProperty(key)) {
                clone[key] = _.util.clone(o[key], visited);
              }
            }

            return clone;

          case 'Array':
            if (visited[_.util.objId(o)]) {
              return visited[_.util.objId(o)];
            }
            var clone = [];
            visited[_.util.objId(o)] = clone;

            o.forEach(function (v, i) {
              clone[i] = _.util.clone(v, visited);
            });

            return clone;
        }

        return o;
      }
    },

    languages: {
      extend: function (id, redef) {
        var lang = _.util.clone(_.languages[id]);

        for (var key in redef) {
          lang[key] = redef[key];
        }

        return lang;
      },

      /**
       * Insert a token before another token in a language literal
       * As this needs to recreate the object (we cannot actually insert before keys in object literals),
       * we cannot just provide an object, we need an object and a key.
       * @param inside The key (or language id) of the parent
       * @param before The key to insert before.
       * @param insert Object with the key/value pairs to insert
       * @param root The object that contains `inside`. If equal to Prism.languages, it can be omitted.
       */
      insertBefore: function (inside, before, insert, root) {
        root = root || _.languages;
        var grammar = root[inside];
        var ret = {};

        for (var token in grammar) {
          if (grammar.hasOwnProperty(token)) {

            if (token == before) {
              for (var newToken in insert) {
                if (insert.hasOwnProperty(newToken)) {
                  ret[newToken] = insert[newToken];
                }
              }
            }

            // Do not insert token which also occur in insert. See #1525
            if (!insert.hasOwnProperty(token)) {
              ret[token] = grammar[token];
            }
          }
        }

        var old = root[inside];
        root[inside] = ret;

        // Update references in other language definitions
        _.languages.DFS(_.languages, function (key, value) {
          if (value === old && key != inside) {
            this[key] = ret;
          }
        });

        return ret;
      },

      // Traverse a language definition with Depth First Search
      DFS: function (o, callback, type, visited) {
        visited = visited || {};
        for (var i in o) {
          if (o.hasOwnProperty(i)) {
            callback.call(o, i, o[i], type || i);

            if (_.util.type(o[i]) === 'Object' && !visited[_.util.objId(o[i])]) {
              visited[_.util.objId(o[i])] = true;
              _.languages.DFS(o[i], callback, null, visited);
            }
            else if (_.util.type(o[i]) === 'Array' && !visited[_.util.objId(o[i])]) {
              visited[_.util.objId(o[i])] = true;
              _.languages.DFS(o[i], callback, i, visited);
            }
          }
        }
      }
    },
    plugins: {},

    highlightAll: function (async, callback) {
      _.highlightAllUnder(document, async, callback);
    },

    highlightAllUnder: function (container, async, callback) {
      var env = {
        callback: callback,
        selector: 'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'
      };

      _.hooks.run("before-highlightall", env);

      var elements = env.elements || container.querySelectorAll(env.selector);

      for (var i = 0, element; element = elements[i++];) {
        _.highlightElement(element, async === true, env.callback);
      }
    },

    highlightElement: function (element, async, callback) {
      // Find language
      var language, grammar, parent = element;

      while (parent && !lang.test(parent.className)) {
        parent = parent.parentNode;
      }

      if (parent) {
        language = (parent.className.match(lang) || [, ''])[1].toLowerCase();
        grammar = _.languages[language];
      }

      // Set language on the element, if not present
      element.className = element.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;

      if (element.parentNode) {
        // Set language on the parent, for styling
        parent = element.parentNode;

        if (/pre/i.test(parent.nodeName)) {
          parent.className = parent.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
        }
      }

      var code = element.textContent;

      var env = {
        element: element,
        language: language,
        grammar: grammar,
        code: code
      };

      var insertHighlightedCode = function (highlightedCode) {
        env.highlightedCode = highlightedCode;

        _.hooks.run('before-insert', env);

        env.element.innerHTML = env.highlightedCode;

        _.hooks.run('after-highlight', env);
        _.hooks.run('complete', env);
        callback && callback.call(env.element);
      }

      _.hooks.run('before-sanity-check', env);

      if (!env.code) {
        _.hooks.run('complete', env);
        return;
      }

      _.hooks.run('before-highlight', env);

      if (!env.grammar) {
        insertHighlightedCode(_.util.encode(env.code));
        return;
      }

      if (async && _self.Worker) {
        var worker = new Worker(_.filename);

        worker.onmessage = function (evt) {
          insertHighlightedCode(evt.data);
        };

        worker.postMessage(JSON.stringify({
          language: env.language,
          code: env.code,
          immediateClose: true
        }));
      }
      else {
        insertHighlightedCode(_.highlight(env.code, env.grammar, env.language));
      }
    },

    highlight: function (text, grammar, language) {
      var env = {
        code: text,
        grammar: grammar,
        language: language
      };
      _.hooks.run('before-tokenize', env);
      env.tokens = _.tokenize(env.code, env.grammar);
      _.hooks.run('after-tokenize', env);
      return Token.stringify(_.util.encode(env.tokens), env.language);
    },

    matchGrammar: function (text, strarr, grammar, index, startPos, oneshot, target) {
      var Token = _.Token;

      for (var token in grammar) {
        if (!grammar.hasOwnProperty(token) || !grammar[token]) {
          continue;
        }

        if (token == target) {
          return;
        }

        var patterns = grammar[token];
        patterns = (_.util.type(patterns) === "Array") ? patterns : [patterns];

        for (var j = 0; j < patterns.length; ++j) {
          var pattern = patterns[j],
            inside = pattern.inside,
            lookbehind = !!pattern.lookbehind,
            greedy = !!pattern.greedy,
            lookbehindLength = 0,
            alias = pattern.alias;

          if (greedy && !pattern.pattern.global) {
            // Without the global flag, lastIndex won't work
            var flags = pattern.pattern.toString().match(/[imuy]*$/)[0];
            pattern.pattern = RegExp(pattern.pattern.source, flags + "g");
          }

          pattern = pattern.pattern || pattern;

          // Don’t cache length as it changes during the loop
          for (var i = index, pos = startPos; i < strarr.length; pos += strarr[i].length, ++i) {

            var str = strarr[i];

            if (strarr.length > text.length) {
              // Something went terribly wrong, ABORT, ABORT!
              return;
            }

            if (str instanceof Token) {
              continue;
            }

            if (greedy && i != strarr.length - 1) {
              pattern.lastIndex = pos;
              var match = pattern.exec(text);
              if (!match) {
                break;
              }

              var from = match.index + (lookbehind ? match[1].length : 0),
                to = match.index + match[0].length,
                k = i,
                p = pos;

              for (var len = strarr.length; k < len && (p < to || (!strarr[k].type && !strarr[k - 1].greedy)); ++k) {
                p += strarr[k].length;
                // Move the index i to the element in strarr that is closest to from
                if (from >= p) {
                  ++i;
                  pos = p;
                }
              }

              // If strarr[i] is a Token, then the match starts inside another Token, which is invalid
              if (strarr[i] instanceof Token) {
                continue;
              }

              // Number of tokens to delete and replace with the new match
              delNum = k - i;
              str = text.slice(pos, p);
              match.index -= pos;
            } else {
              pattern.lastIndex = 0;

              var match = pattern.exec(str),
                delNum = 1;
            }

            if (!match) {
              if (oneshot) {
                break;
              }

              continue;
            }

            if (lookbehind) {
              lookbehindLength = match[1] ? match[1].length : 0;
            }

            var from = match.index + lookbehindLength,
              match = match[0].slice(lookbehindLength),
              to = from + match.length,
              before = str.slice(0, from),
              after = str.slice(to);

            var args = [i, delNum];

            if (before) {
              ++i;
              pos += before.length;
              args.push(before);
            }

            var wrapped = new Token(token, inside ? _.tokenize(match, inside) : match, alias, match, greedy);

            args.push(wrapped);

            if (after) {
              args.push(after);
            }

            Array.prototype.splice.apply(strarr, args);

            if (delNum != 1)
              _.matchGrammar(text, strarr, grammar, i, pos, true, token);

            if (oneshot)
              break;
          }
        }
      }
    },

    tokenize: function (text, grammar) {
      var strarr = [text];

      var rest = grammar.rest;

      if (rest) {
        for (var token in rest) {
          grammar[token] = rest[token];
        }

        delete grammar.rest;
      }

      _.matchGrammar(text, strarr, grammar, 0, 0, false);

      return strarr;
    },

    hooks: {
      all: {},

      add: function (name, callback) {
        var hooks = _.hooks.all;

        hooks[name] = hooks[name] || [];

        hooks[name].push(callback);
      },

      run: function (name, env) {
        var callbacks = _.hooks.all[name];

        if (!callbacks || !callbacks.length) {
          return;
        }

        for (var i = 0, callback; callback = callbacks[i++];) {
          callback(env);
        }
      }
    }
  };

  var Token = _.Token = function (type, content, alias, matchedStr, greedy) {
    this.type = type;
    this.content = content;
    this.alias = alias;
    // Copy of the full string this token was created from
    this.length = (matchedStr || "").length | 0;
    this.greedy = !!greedy;
  };

  Token.stringify = function (o, language, parent) {
    if (typeof o == 'string') {
      return o;
    }

    if (_.util.type(o) === 'Array') {
      return o.map(function (element) {
        return Token.stringify(element, language, o);
      }).join('');
    }

    var env = {
      type: o.type,
      content: Token.stringify(o.content, language, parent),
      tag: 'span',
      classes: ['token', o.type],
      attributes: {},
      language: language,
      parent: parent
    };

    if (o.alias) {
      var aliases = _.util.type(o.alias) === 'Array' ? o.alias : [o.alias];
      Array.prototype.push.apply(env.classes, aliases);
    }

    _.hooks.run('wrap', env);

    var attributes = Object.keys(env.attributes).map(function (name) {
      return name + '="' + (env.attributes[name] || '').replace(/"/g, '&quot;') + '"';
    }).join(' ');

    return '<' + env.tag + ' class="' + env.classes.join(' ') + '"' + (attributes ? ' ' + attributes : '') + '>' + env.content + '</' + env.tag + '>';

  };

  if (!_self.document) {
    if (!_self.addEventListener) {
      // in Node.js
      return _self.Prism;
    }

    if (!_.disableWorkerMessageHandler) {
      // In worker
      _self.addEventListener('message', function (evt) {
        var message = JSON.parse(evt.data),
          lang = message.language,
          code = message.code,
          immediateClose = message.immediateClose;

        _self.postMessage(_.highlight(code, _.languages[lang], lang));
        if (immediateClose) {
          _self.close();
        }
      }, false);
    }

    return _self.Prism;
  }

  //Get current script and highlight
  var script = document.currentScript || [].slice.call(document.getElementsByTagName("script")).pop();

  if (script) {
    _.filename = script.src;

    if (!_.manual && !script.hasAttribute('data-manual')) {
      if (document.readyState !== "loading") {
        if (window.requestAnimationFrame) {
          window.requestAnimationFrame(_.highlightAll);
        } else {
          window.setTimeout(_.highlightAll, 16);
        }
      }
      else {
        document.addEventListener('DOMContentLoaded', _.highlightAll);
      }
    }
  }

  return _self.Prism;

})();

if (typeof module !== 'undefined' && module.exports) {
  module.exports = Prism;
}

// hack for components to work correctly in node.js
if (typeof global !== 'undefined') {
  global.Prism = Prism;
}


/* **********************************************
     Begin prism-markup.js
********************************************** */

Prism.languages.markup = {
  'comment': /<!--[\s\S]*?-->/,
  'prolog': /<\?[\s\S]+?\?>/,
  'doctype': /<!DOCTYPE[\s\S]+?>/i,
  'cdata': /<!\[CDATA\[[\s\S]*?]]>/i,
  'tag': {
    pattern: /<\/?(?!\d)[^\s>\/=$<%]+(?:\s+[^\s>\/=]+(?:=(?:("|')(?:\\[\s\S]|(?!\1)[^\\])*\1|[^\s'">=]+))?)*\s*\/?>/i,
    greedy: true,
    inside: {
      'tag': {
        pattern: /^<\/?[^\s>\/]+/i,
        inside: {
          'punctuation': /^<\/?/,
          'namespace': /^[^\s>\/:]+:/
        }
      },
      'attr-value': {
        pattern: /=(?:("|')(?:\\[\s\S]|(?!\1)[^\\])*\1|[^\s'">=]+)/i,
        inside: {
          'punctuation': [
            /^=/,
            {
              pattern: /(^|[^\\])["']/,
              lookbehind: true
            }
          ]
        }
      },
      'punctuation': /\/?>/,
      'attr-name': {
        pattern: /[^\s>\/]+/,
        inside: {
          'namespace': /^[^\s>\/:]+:/
        }
      }

    }
  },
  'entity': /&#?[\da-z]{1,8};/i
};

Prism.languages.markup['tag'].inside['attr-value'].inside['entity'] =
  Prism.languages.markup['entity'];

// Plugin to make entity title show the real entity, idea by Roman Komarov
Prism.hooks.add('wrap', function (env) {

  if (env.type === 'entity') {
    env.attributes['title'] = env.content.replace(/&amp;/, '&');
  }
});

Prism.languages.xml = Prism.languages.extend('markup', {});
Prism.languages.html = Prism.languages.markup;
Prism.languages.mathml = Prism.languages.markup;
Prism.languages.svg = Prism.languages.markup;


/* **********************************************
     Begin prism-css.js
********************************************** */

Prism.languages.css = {
  'comment': /\/\*[\s\S]*?\*\//,
  'atrule': {
    pattern: /@[\w-]+?[\s\S]*?(?:;|(?=\s*\{))/i,
    inside: {
      'rule': /@[\w-]+/
      // See rest below
    }
  },
  'url': /url\((?:(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1|.*?)\)/i,
  'selector': /[^{}\s][^{};]*?(?=\s*\{)/,
  'string': {
    pattern: /("|')(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
    greedy: true
  },
  'property': /[-_a-z\xA0-\uFFFF][-\w\xA0-\uFFFF]*(?=\s*:)/i,
  'important': /!important\b/i,
  'function': /[-a-z0-9]+(?=\()/i,
  'punctuation': /[(){};:,]/
};

Prism.languages.css['atrule'].inside.rest = Prism.languages.css;

if (Prism.languages.markup) {
  Prism.languages.insertBefore('markup', 'tag', {
    'style': {
      pattern: /(<style[\s\S]*?>)[\s\S]*?(?=<\/style>)/i,
      lookbehind: true,
      inside: Prism.languages.css,
      alias: 'language-css',
      greedy: true
    }
  });

  Prism.languages.insertBefore('inside', 'attr-value', {
    'style-attr': {
      pattern: /\s*style=("|')(?:\\[\s\S]|(?!\1)[^\\])*\1/i,
      inside: {
        'attr-name': {
          pattern: /^\s*style/i,
          inside: Prism.languages.markup.tag.inside
        },
        'punctuation': /^\s*=\s*['"]|['"]\s*$/,
        'attr-value': {
          pattern: /.+/i,
          inside: Prism.languages.css
        }
      },
      alias: 'language-css'
    }
  }, Prism.languages.markup.tag);
}


/* **********************************************
     Begin prism-clike.js
********************************************** */

Prism.languages.clike = {
  'comment': [
    {
      pattern: /(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/,
      lookbehind: true
    },
    {
      pattern: /(^|[^\\:])\/\/.*/,
      lookbehind: true,
      greedy: true
    }
  ],
  'string': {
    pattern: /(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
    greedy: true
  },
  'class-name': {
    pattern: /((?:\b(?:class|interface|extends|implements|trait|instanceof|new)\s+)|(?:catch\s+\())[\w.\\]+/i,
    lookbehind: true,
    inside: {
      punctuation: /[.\\]/
    }
  },
  'keyword': /\b(?:if|else|while|do|for|return|in|instanceof|function|new|try|throw|catch|finally|null|break|continue)\b/,
  'boolean': /\b(?:true|false)\b/,
  'function': /\w+(?=\()/,
  'number': /\b0x[\da-f]+\b|(?:\b\d+\.?\d*|\B\.\d+)(?:e[+-]?\d+)?/i,
  'operator': /--?|\+\+?|!=?=?|<=?|>=?|==?=?|&&?|\|\|?|\?|\*|\/|~|\^|%/,
  'punctuation': /[{}[\];(),.:]/
};


/* **********************************************
     Begin prism-javascript.js
********************************************** */

Prism.languages.javascript = Prism.languages.extend('clike', {
  'class-name': [
    Prism.languages.clike['class-name'],
    {
      pattern: /(^|[^$\w\xA0-\uFFFF])[_$A-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\.(?:prototype|constructor))/,
      lookbehind: true
    }
  ],
  'keyword': [
    {
      pattern: /((?:^|})\s*)(?:catch|finally)\b/,
      lookbehind: true
    },
    /\b(?:as|async|await|break|case|class|const|continue|debugger|default|delete|do|else|enum|export|extends|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|undefined|var|void|while|with|yield)\b/
  ],
  'number': /\b(?:(?:0[xX][\dA-Fa-f]+|0[bB][01]+|0[oO][0-7]+)n?|\d+n|NaN|Infinity)\b|(?:\b\d+\.?\d*|\B\.\d+)(?:[Ee][+-]?\d+)?/,
  // Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
  'function': /[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*\(|\.(?:apply|bind|call)\()/,
  'operator': /-[-=]?|\+[+=]?|!=?=?|<<?=?|>>?>?=?|=(?:==?|>)?|&[&=]?|\|[|=]?|\*\*?=?|\/=?|~|\^=?|%=?|\?|\.{3}/
});

Prism.languages.javascript['class-name'][0].pattern = /(\b(?:class|interface|extends|implements|instanceof|new)\s+)[\w.\\]+/

Prism.languages.insertBefore('javascript', 'keyword', {
  'regex': {
    pattern: /((?:^|[^$\w\xA0-\uFFFF."'\])\s])\s*)\/(\[(?:[^\]\\\r\n]|\\.)*]|\\.|[^/\\\[\r\n])+\/[gimyu]{0,5}(?=\s*($|[\r\n,.;})\]]))/,
    lookbehind: true,
    greedy: true
  },
  // This must be declared before keyword because we use "function" inside the look-forward
  'function-variable': {
    pattern: /[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*[=:]\s*(?:async\s*)?(?:\bfunction\b|(?:\((?:[^()]|\([^()]*\))*\)|[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)\s*=>))/,
    alias: 'function'
  },
  'parameter': [
    {
      pattern: /(function(?:\s+[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)?\s*\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\))/,
      lookbehind: true,
      inside: Prism.languages.javascript
    },
    {
      pattern: /[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*=>)/i,
      inside: Prism.languages.javascript
    },
    {
      pattern: /(\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*=>)/,
      lookbehind: true,
      inside: Prism.languages.javascript
    },
    {
      pattern: /((?:\b|\s|^)(?!(?:as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|undefined|var|void|while|with|yield)(?![$\w\xA0-\uFFFF]))(?:[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*\s*)\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*\{)/,
      lookbehind: true,
      inside: Prism.languages.javascript
    }
  ],
  'constant': /\b[A-Z][A-Z\d_]*\b/
});

Prism.languages.insertBefore('javascript', 'string', {
  'template-string': {
    pattern: /`(?:\\[\s\S]|\${[^}]+}|[^\\`])*`/,
    greedy: true,
    inside: {
      'interpolation': {
        pattern: /\${[^}]+}/,
        inside: {
          'interpolation-punctuation': {
            pattern: /^\${|}$/,
            alias: 'punctuation'
          },
          rest: Prism.languages.javascript
        }
      },
      'string': /[\s\S]+/
    }
  }
});

if (Prism.languages.markup) {
  Prism.languages.insertBefore('markup', 'tag', {
    'script': {
      pattern: /(<script[\s\S]*?>)[\s\S]*?(?=<\/script>)/i,
      lookbehind: true,
      inside: Prism.languages.javascript,
      alias: 'language-javascript',
      greedy: true
    }
  });
}

Prism.languages.js = Prism.languages.javascript;


/* **********************************************
     Begin prism-file-highlight.js
********************************************** */

(function () {
  if (typeof self === 'undefined' || !self.Prism || !self.document || !document.querySelector) {
    return;
  }

	/**
	 * @param {Element} [container=document]
	 */
  self.Prism.fileHighlight = function (container) {
    container = container || document;

    var Extensions = {
      'js': 'javascript',
      'py': 'python',
      'rb': 'ruby',
      'ps1': 'powershell',
      'psm1': 'powershell',
      'sh': 'bash',
      'bat': 'batch',
      'h': 'c',
      'tex': 'latex'
    };

    Array.prototype.slice.call(container.querySelectorAll('pre[data-src]')).forEach(function (pre) {
      // ignore if already loaded
      if (pre.hasAttribute('data-src-loaded')) {
        return;
      }

      // load current
      var src = pre.getAttribute('data-src');

      var language, parent = pre;
      var lang = /\blang(?:uage)?-([\w-]+)\b/i;
      while (parent && !lang.test(parent.className)) {
        parent = parent.parentNode;
      }

      if (parent) {
        language = (pre.className.match(lang) || [, ''])[1];
      }

      if (!language) {
        var extension = (src.match(/\.(\w+)$/) || [, ''])[1];
        language = Extensions[extension] || extension;
      }

      var code = document.createElement('code');
      code.className = 'language-' + language;

      pre.textContent = '';

      code.textContent = 'Loading…';

      pre.appendChild(code);

      var xhr = new XMLHttpRequest();

      xhr.open('GET', src, true);

      xhr.onreadystatechange = function () {
        if (xhr.readyState == 4) {

          if (xhr.status < 400 && xhr.responseText) {
            code.textContent = xhr.responseText;

            Prism.highlightElement(code);
            // mark as loaded
            pre.setAttribute('data-src-loaded', '');
          }
          else if (xhr.status >= 400) {
            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
          }
          else {
            code.textContent = '✖ Error: File does not exist or is empty';
          }
        }
      };

      xhr.send(null);
    });

    if (Prism.plugins.toolbar) {
      Prism.plugins.toolbar.registerButton('download-file', function (env) {
        var pre = env.element.parentNode;
        if (!pre || !/pre/i.test(pre.nodeName) || !pre.hasAttribute('data-src') || !pre.hasAttribute('data-download-link')) {
          return;
        }
        var src = pre.getAttribute('data-src');
        var a = document.createElement('a');
        a.textContent = pre.getAttribute('data-download-link-label') || 'Download';
        a.setAttribute('download', '');
        a.href = src;
        return a;
      });
    }

  };

  document.addEventListener('DOMContentLoaded', function () {
    // execute inside handler, for dropping Event as argumnet
    self.Prism.fileHighlight();
  });

})();

(function () {

  if (typeof self === 'undefined' || !self.Prism || !self.document) {
    return;
  }

	/**
	 * Plugin name which is used as a class name for <pre> which is activating the plugin
	 * @type {String}
	 */
  var PLUGIN_NAME = 'line-numbers';

	/**
	 * Regular expression used for determining line breaks
	 * @type {RegExp}
	 */
  var NEW_LINE_EXP = /\n(?!$)/g;

	/**
	 * Resizes line numbers spans according to height of line of code
	 * @param {Element} element <pre> element
	 */
  var _resizeElement = function (element) {
    var codeStyles = getStyles(element);
    var whiteSpace = codeStyles['white-space'];

    if (whiteSpace === 'pre-wrap' || whiteSpace === 'pre-line') {
      var codeElement = element.querySelector('code');
      var lineNumbersWrapper = element.querySelector('.line-numbers-rows');
      var lineNumberSizer = element.querySelector('.line-numbers-sizer');
      var codeLines = codeElement.textContent.split(NEW_LINE_EXP);

      if (!lineNumberSizer) {
        lineNumberSizer = document.createElement('span');
        lineNumberSizer.className = 'line-numbers-sizer';

        codeElement.appendChild(lineNumberSizer);
      }

      lineNumberSizer.style.display = 'block';

      codeLines.forEach(function (line, lineNumber) {
        lineNumberSizer.textContent = line || '\n';
        var lineSize = lineNumberSizer.getBoundingClientRect().height;
        lineNumbersWrapper.children[lineNumber].style.height = lineSize + 'px';
      });

      lineNumberSizer.textContent = '';
      lineNumberSizer.style.display = 'none';
    }
  };

	/**
	 * Returns style declarations for the element
	 * @param {Element} element
	 */
  var getStyles = function (element) {
    if (!element) {
      return null;
    }

    return window.getComputedStyle ? getComputedStyle(element) : (element.currentStyle || null);
  };

  window.addEventListener('resize', function () {
    Array.prototype.forEach.call(document.querySelectorAll('pre.' + PLUGIN_NAME), _resizeElement);
  });

  Prism.hooks.add('complete', function (env) {
    if (!env.code) {
      return;
    }

    // works only for <code> wrapped inside <pre> (not inline)
    var pre = env.element.parentNode;
    var clsReg = /\s*\bline-numbers\b\s*/;
    if (
      !pre || !/pre/i.test(pre.nodeName) ||
      // Abort only if nor the <pre> nor the <code> have the class
      (!clsReg.test(pre.className) && !clsReg.test(env.element.className))
    ) {
      return;
    }

    if (env.element.querySelector('.line-numbers-rows')) {
      // Abort if line numbers already exists
      return;
    }

    if (clsReg.test(env.element.className)) {
      // Remove the class 'line-numbers' from the <code>
      env.element.className = env.element.className.replace(clsReg, ' ');
    }
    if (!clsReg.test(pre.className)) {
      // Add the class 'line-numbers' to the <pre>
      pre.className += ' line-numbers';
    }

    var match = env.code.match(NEW_LINE_EXP);
    var linesNum = match ? match.length + 1 : 1;
    var lineNumbersWrapper;

    var lines = new Array(linesNum + 1);
    lines = lines.join('<span></span>');

    lineNumbersWrapper = document.createElement('span');
    lineNumbersWrapper.setAttribute('aria-hidden', 'true');
    lineNumbersWrapper.className = 'line-numbers-rows';
    lineNumbersWrapper.innerHTML = lines;

    if (pre.hasAttribute('data-start')) {
      pre.style.counterReset = 'linenumber ' + (parseInt(pre.getAttribute('data-start'), 10) - 1);
    }

    env.element.appendChild(lineNumbersWrapper);

    _resizeElement(pre);

    Prism.hooks.run('line-numbers', env);
  });

  Prism.hooks.add('line-numbers', function (env) {
    env.plugins = env.plugins || {};
    env.plugins.lineNumbers = true;
  });

	/**
	 * Global exports
	 */
  Prism.plugins.lineNumbers = {
		/**
		 * Get node for provided line number
		 * @param {Element} element pre element
		 * @param {Number} number line number
		 * @return {Element|undefined}
		 */
    getLine: function (element, number) {
      if (element.tagName !== 'PRE' || !element.classList.contains(PLUGIN_NAME)) {
        return;
      }

      var lineNumberRows = element.querySelector('.line-numbers-rows');
      var lineNumberStart = parseInt(element.getAttribute('data-start'), 10) || 1;
      var lineNumberEnd = lineNumberStart + (lineNumberRows.children.length - 1);

      if (number < lineNumberStart) {
        number = lineNumberStart;
      }
      if (number > lineNumberEnd) {
        number = lineNumberEnd;
      }

      var lineIndex = number - lineNumberStart;

      return lineNumberRows.children[lineIndex];
    }
  };

}());