kmx.io/prism.js/prism.js

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• Hash : 12c0b20a
  Author :
  Date : 2018-03-08T22:19:01
  

  Decouple minus sign from number pattern in most languages. Close #1110

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• prism.js

• 
  /* **********************************************
       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).match(/\[object (\w+)\]/)[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) {
  			var type = _.util.type(o);
  
  			switch (type) {
  				case 'Object':
  					var clone = {};
  
  					for (var key in o) {
  						if (o.hasOwnProperty(key)) {
  							clone[key] = _.util.clone(o[key]);
  						}
  					}
  
  					return clone;
  
  				case 'Array':
  					return o.map(function(v) { return _.util.clone(v); });
  			}
  
  			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 anobject and a key.
  		 * @param inside The key (or language id) of the parent
  		 * @param before The key to insert before. If not provided, the function appends instead.
  		 * @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];
  
  			if (arguments.length == 2) {
  				insert = arguments[1];
  
  				for (var newToken in insert) {
  					if (insert.hasOwnProperty(newToken)) {
  						grammar[newToken] = insert[newToken];
  					}
  				}
  
  				return grammar;
  			}
  
  			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];
  							}
  						}
  					}
  
  					ret[token] = grammar[token];
  				}
  			}
  
  			// Update references in other language definitions
  			_.languages.DFS(_.languages, function(key, value) {
  				if (value === root[inside] && key != inside) {
  					this[key] = ret;
  				}
  			});
  
  			return root[inside] = 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
  		};
  
  		_.hooks.run('before-sanity-check', env);
  
  		if (!env.code || !env.grammar) {
  			if (env.code) {
  				_.hooks.run('before-highlight', env);
  				env.element.textContent = env.code;
  				_.hooks.run('after-highlight', env);
  			}
  			_.hooks.run('complete', env);
  			return;
  		}
  
  		_.hooks.run('before-highlight', env);
  
  		if (async && _self.Worker) {
  			var worker = new Worker(_.filename);
  
  			worker.onmessage = function(evt) {
  				env.highlightedCode = evt.data;
  
  				_.hooks.run('before-insert', env);
  
  				env.element.innerHTML = env.highlightedCode;
  
  				callback && callback.call(env.element);
  				_.hooks.run('after-highlight', env);
  				_.hooks.run('complete', env);
  			};
  
  			worker.postMessage(JSON.stringify({
  				language: env.language,
  				code: env.code,
  				immediateClose: true
  			}));
  		}
  		else {
  			env.highlightedCode = _.highlight(env.code, env.grammar, env.language);
  
  			_.hooks.run('before-insert', env);
  
  			env.element.innerHTML = env.highlightedCode;
  
  			callback && callback.call(element);
  
  			_.hooks.run('after-highlight', env);
  			_.hooks.run('complete', env);
  		}
  	},
  
  	highlight: function (text, grammar, language) {
  		var tokens = _.tokenize(text, grammar);
  		return Token.stringify(_.util.encode(tokens), 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;
  					}
  
  					pattern.lastIndex = 0;
  
  					var match = pattern.exec(str),
  					    delNum = 1;
  
  					// Greedy patterns can override/remove up to two previously matched tokens
  					if (!match && greedy && i != strarr.length - 1) {
  						pattern.lastIndex = pos;
  						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[k - 1] is greedy we are in conflict with another greedy pattern
  						 */
  						if (strarr[i] instanceof Token || strarr[k - 1].greedy) {
  							continue;
  						}
  
  						// Number of tokens to delete and replace with the new match
  						delNum = k - i;
  						str = text.slice(pos, p);
  						match.index -= pos;
  					}
  
  					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, language) {
  		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,
  		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.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*\{))/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': /\B!important\b/i,
  	'function': /[-a-z0-9]+(?=\()/i,
  	'punctuation': /[(){};:]/
  };
  
  Prism.languages.css['atrule'].inside.rest = Prism.util.clone(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: /(^|[^\\:])\/\/.*/,
  			lookbehind: true
  		},
  		{
  			pattern: /(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/,
  			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': /[a-z0-9_]+(?=\()/i,
  	'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', {
  	'keyword': /\b(?: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|var|void|while|with|yield)\b/,
  	'number': /\b(?:0[xX][\dA-Fa-f]+|0[bB][01]+|0[oO][0-7]+|NaN|Infinity)\b|(?:\b\d+\.?\d*|\B\.\d+)(?:[Ee][+-]?\d+)?/,
  	// Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
  	'function': /[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*\()/i,
  	'operator': /-[-=]?|\+[+=]?|!=?=?|<<?=?|>>?>?=?|=(?:==?|>)?|&[&=]?|\|[|=]?|\*\*?=?|\/=?|~|\^=?|%=?|\?|\.{3}/
  });
  
  Prism.languages.insertBefore('javascript', 'keyword', {
  	'regex': {
  		pattern: /(^|[^/])\/(?!\/)(\[[^\]\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-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*=\s*(?:function\b|(?:\([^()]*\)|[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)\s*=>))/i,
  		alias: 'function'
  	}
  });
  
  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;
  	}
  
  	self.Prism.fileHighlight = function() {
  
  		var Extensions = {
  			'js': 'javascript',
  			'py': 'python',
  			'rb': 'ruby',
  			'ps1': 'powershell',
  			'psm1': 'powershell',
  			'sh': 'bash',
  			'bat': 'batch',
  			'h': 'c',
  			'tex': 'latex'
  		};
  
  		Array.prototype.slice.call(document.querySelectorAll('pre[data-src]')).forEach(function (pre) {
  			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);
  					}
  					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);
  		});
  
  	};
  
  	document.addEventListener('DOMContentLoaded', self.Prism.fileHighlight);
  
  })();
  

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