tdf#115663 Syntax highlight in BASIC code examples

Use prism.js to highlight BASIC code in help pages
See README.prism.js.txt for details

added normalize-whitespaces plugin to remove extra 1st line
cleaned some useless css class

Change-Id: I6dde4d217a29f485199ced462b896ee1b500fba0
Reviewed-on: https://gerrit.libreoffice.org/64252
Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>

1 files changed, 1190 insertions, 0 deletions

diff --git a/help3xsl/prism.js b/help3xsl/prism.js
new file mode 100644
index 0000000000..c085b09b00
--- /dev/null
+++ b/help3xsl/prism.js
@@ -0,0 +1,1190 @@
+/* PrismJS 1.15.0
+https://prismjs.com/download.html#themes=prism-coy&languages=markup+css+clike+javascript+python+visual-basic&plugins=line-numbers+normalize-whitespace */
+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 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];
+				}
+			}
+
+			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
+		};
+
+		_.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;
+
+				_.hooks.run('after-highlight', env);
+				_.hooks.run('complete', env);
+				callback && callback.call(env.element);
+			};
+
+			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;
+
+			_.hooks.run('after-highlight', env);
+
+			_.hooks.run('complete', env);
+
+			callback && callback.call(element);
+		}
+	},
+
+	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, 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;
+}
+;
+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.markup;
+Prism.languages.html = Prism.languages.markup;
+Prism.languages.mathml = Prism.languages.markup;
+Prism.languages.svg = Prism.languages.markup;
+
+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': /!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*$/,
+				'attr-value': {
+					pattern: /.+/i,
+					inside: Prism.languages.css
+				}
+			},
+			alias: 'language-css'
+		}
+	}, Prism.languages.markup.tag);
+}
+;
+Prism.languages.clike = {
+	'comment': [
+		{
+			pattern: /(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/,
+			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': /[{}[\];(),.:]/
+};
+
+Prism.languages.javascript = Prism.languages.extend('clike', {
+	'class-name': [
+		Prism.languages.clike['class-name'],
+		{
+			pattern: /(^|[^$\w\xA0-\uFFFF])[_$A-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\.(?:prototype|constructor))/,
+			lookbehind: true
+		}
+	],
+	'keyword': [
+		{
+			pattern: /((?:^|})\s*)(?:catch|finally)\b/,
+			lookbehind: true
+		},
+		/\b(?:as|async|await|break|case|class|const|continue|debugger|default|delete|do|else|enum|export|extends|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|var|void|while|with|yield)\b/
+	],
+	'number': /\b(?:(?:0[xX][\dA-Fa-f]+|0[bB][01]+|0[oO][0-7]+)n?|\d+n|NaN|Infinity)\b|(?:\b\d+\.?\d*|\B\.\d+)(?:[Ee][+-]?\d+)?/,
+	// Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
+	'function': /[_$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: /[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*[=:]\s*(?:function\b|(?:\([^()]*\)|[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)\s*=>))/i,
+		alias: 'function'
+	},
+	'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;
+
+Prism.languages.python = {
+	'comment': {
+		pattern: /(^|[^\\])#.*/,
+		lookbehind: true
+	},
+	'triple-quoted-string': {
+		pattern: /("""|''')[\s\S]+?\1/,
+		greedy: true,
+		alias: 'string'
+	},
+	'string': {
+		pattern: /("|')(?:\\.|(?!\1)[^\\\r\n])*\1/,
+		greedy: true
+	},
+	'function': {
+		pattern: /((?:^|\s)def[ \t]+)[a-zA-Z_]\w*(?=\s*\()/g,
+		lookbehind: true
+	},
+	'class-name': {
+		pattern: /(\bclass\s+)\w+/i,
+		lookbehind: true
+	},
+	'keyword': /\b(?:and|as|assert|async|await|break|class|continue|def|del|elif|else|except|exec|finally|for|from|global|if|import|in|is|lambda|nonlocal|not|or|pass|print|raise|return|try|while|with|yield)\b/,
+	'builtin':/\b(?:__import__|abs|all|any|apply|ascii|basestring|bin|bool|buffer|bytearray|bytes|callable|chr|classmethod|cmp|coerce|compile|complex|delattr|dict|dir|divmod|enumerate|eval|execfile|file|filter|float|format|frozenset|getattr|globals|hasattr|hash|help|hex|id|input|int|intern|isinstance|issubclass|iter|len|list|locals|long|map|max|memoryview|min|next|object|oct|open|ord|pow|property|range|raw_input|reduce|reload|repr|reversed|round|set|setattr|slice|sorted|staticmethod|str|sum|super|tuple|type|unichr|unicode|vars|xrange|zip)\b/,
+	'boolean': /\b(?:True|False|None)\b/,
+	'number': /(?:\b(?=\d)|\B(?=\.))(?:0[bo])?(?:(?:\d|0x[\da-f])[\da-f]*\.?\d*|\.\d+)(?:e[+-]?\d+)?j?\b/i,
+	'operator': /[-+%=]=?|!=|\*\*?=?|\/\/?=?|<[<=>]?|>[=>]?|[&|^~]/,
+	'punctuation': /[{}[\];(),.:]/
+};
+
+Prism.languages['visual-basic'] = {
+	'comment': {
+		pattern: /(?:['‘’]|REM\b).*/i,
+		inside: {
+			'keyword': /^REM/i
+		}
+	},
+	'directive': {
+		pattern: /#(?:Const|Else|ElseIf|End|ExternalChecksum|ExternalSource|If|Region)(?:[^\S\r\n]_[^\S\r\n]*(?:\r\n?|\n)|.)+/i,
+		alias: 'comment',
+		greedy: true
+	},
+	'string': {
+		pattern: /["“”](?:["“”]{2}|[^"“”])*["“”]C?/i,
+		greedy: true
+	},
+	'date': {
+		pattern: /#[^\S\r\n]*(?:\d+([/-])\d+\1\d+(?:[^\S\r\n]+(?:\d+[^\S\r\n]*(?:AM|PM)|\d+:\d+(?::\d+)?(?:[^\S\r\n]*(?:AM|PM))?))?|(?:\d+[^\S\r\n]*(?:AM|PM)|\d+:\d+(?::\d+)?(?:[^\S\r\n]*(?:AM|PM))?))[^\S\r\n]*#/i,
+		alias: 'builtin'
+	},
+	'number': /(?:(?:\b\d+(?:\.\d+)?|\.\d+)(?:E[+-]?\d+)?|&[HO][\dA-F]+)(?:U?[ILS]|[FRD])?/i,
+	'boolean': /\b(?:True|False|Nothing)\b/i,
+	'keyword': /\b(?:AddHandler|AddressOf|Alias|And(?:Also)?|As|Boolean|ByRef|Byte|ByVal|Call|Case|Catch|C(?:Bool|Byte|Char|Date|Dbl|Dec|Int|Lng|Obj|SByte|Short|Sng|Str|Type|UInt|ULng|UShort)|Char|Class|Const|Continue|Date|Decimal|Declare|Default|Delegate|Dim|DirectCast|Do|Double|Each|Else(?:If)?|End(?:If)?|Enum|Erase|Error|Event|Exit|Finally|For|Friend|Function|Get(?:Type|XMLNamespace)?|Global|GoSub|GoTo|Handles|If|Implements|Imports|In|Inherits|Integer|Interface|Is|IsNot|Let|Lib|Like|Long|Loop|Me|Mod|Module|Must(?:Inherit|Override)|My(?:Base|Class)|Namespace|Narrowing|New|Next|Not(?:Inheritable|Overridable)?|Object|Of|On|Operator|Option(?:al)?|Or(?:Else)?|Out|Overloads|Overridable|Overrides|ParamArray|Partial|Private|Property|Protected|Public|RaiseEvent|ReadOnly|ReDim|RemoveHandler|Resume|Return|SByte|Select|Set|Shadows|Shared|short|Single|Static|Step|Stop|String|Structure|Sub|SyncLock|Then|Throw|To|Try|TryCast|TypeOf|U(?:Integer|Long|Short)|Using|Variant|Wend|When|While|Widening|With(?:Events)?|WriteOnly|Xor)\b/i,
+	'operator': [
+		/[+\-*/\\^<=>&#@$%!]/,
+		{
+			pattern: /([^\S\r\n])_(?=[^\S\r\n]*[\r\n])/,
+			lookbehind: true
+		}
+	],
+	'punctuation': /[{}().,:?]/
+};
+
+Prism.languages.vb = Prism.languages['visual-basic'];
+(function () {
+
+	if (typeof self === 'undefined' || !self.Prism || !self.document) {
+		return;
+	}
+
+	/**
+	 * Plugin name which is used as a class name for <pre> which is activating the plugin
+	 * @type {String}
+	 */
+	var PLUGIN_NAME = 'line-numbers';
+
+	/**
+	 * Regular expression used for determining line breaks
+	 * @type {RegExp}
+	 */
+	var NEW_LINE_EXP = /\n(?!$)/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];
+		}
+	};
+
+}());
+(function() {
+
+var assign = Object.assign || function (obj1, obj2) {
+	for (var name in obj2) {
+		if (obj2.hasOwnProperty(name))
+			obj1[name] = obj2[name];
+	}
+	return obj1;
+}
+
+function NormalizeWhitespace(defaults) {
+	this.defaults = assign({}, defaults);
+}
+
+function toCamelCase(value) {
+	return value.replace(/-(\w)/g, function(match, firstChar) {
+		return firstChar.toUpperCase();
+	});
+}
+
+function tabLen(str) {
+	var res = 0;
+	for (var i = 0; i < str.length; ++i) {
+		if (str.charCodeAt(i) == '\t'.charCodeAt(0))
+			res += 3;
+	}
+	return str.length + res;
+}
+
+NormalizeWhitespace.prototype = {
+	setDefaults: function (defaults) {
+		this.defaults = assign(this.defaults, defaults);
+	},
+	normalize: function (input, settings) {
+		settings = assign(this.defaults, settings);
+
+		for (var name in settings) {
+			var methodName = toCamelCase(name);
+			if (name !== "normalize" && methodName !== 'setDefaults' &&
+					settings[name] && this[methodName]) {
+				input = this[methodName].call(this, input, settings[name]);
+			}
+		}
+
+		return input;
+	},
+
+	/*
+	 * Normalization methods
+	 */
+	leftTrim: function (input) {
+		return input.replace(/^\s+/, '');
+	},
+	rightTrim: function (input) {
+		return input.replace(/\s+$/, '');
+	},
+	tabsToSpaces: function (input, spaces) {
+		spaces = spaces|0 || 4;
+		return input.replace(/\t/g, new Array(++spaces).join(' '));
+	},
+	spacesToTabs: function (input, spaces) {
+		spaces = spaces|0 || 4;
+		return input.replace(RegExp(' {' + spaces + '}', 'g'), '\t');
+	},
+	removeTrailing: function (input) {
+		return input.replace(/\s*?$/gm, '');
+	},
+	// Support for deprecated plugin remove-initial-line-feed
+	removeInitialLineFeed: function (input) {
+		return input.replace(/^(?:\r?\n|\r)/, '');
+	},
+	removeIndent: function (input) {
+		var indents = input.match(/^[^\S\n\r]*(?=\S)/gm);
+
+		if (!indents || !indents[0].length)
+			return input;
+
+		indents.sort(function(a, b){return a.length - b.length; });
+
+		if (!indents[0].length)
+			return input;
+
+		return input.replace(RegExp('^' + indents[0], 'gm'), '');
+	},
+	indent: function (input, tabs) {
+		return input.replace(/^[^\S\n\r]*(?=\S)/gm, new Array(++tabs).join('\t') + '$&');
+	},
+	breakLines: function (input, characters) {
+		characters = (characters === true) ? 80 : characters|0 || 80;
+
+		var lines = input.split('\n');
+		for (var i = 0; i < lines.length; ++i) {
+			if (tabLen(lines[i]) <= characters)
+				continue;
+
+			var line = lines[i].split(/(\s+)/g),
+			    len = 0;
+
+			for (var j = 0; j < line.length; ++j) {
+				var tl = tabLen(line[j]);
+				len += tl;
+				if (len > characters) {
+					line[j] = '\n' + line[j];
+					len = tl;
+				}
+			}
+			lines[i] = line.join('');
+		}
+		return lines.join('\n');
+	}
+};
+
+// Support node modules
+if (typeof module !== 'undefined' && module.exports) {
+	module.exports = NormalizeWhitespace;
+}
+
+// Exit if prism is not loaded
+if (typeof Prism === 'undefined') {
+	return;
+}
+
+Prism.plugins.NormalizeWhitespace = new NormalizeWhitespace({
+	'remove-trailing': true,
+	'remove-indent': true,
+	'left-trim': true,
+	'right-trim': true,
+	/*'break-lines': 80,
+	'indent': 2,*/
+	'remove-initial-line-feed': true,
+	/*'tabs-to-spaces': 4,
+	'spaces-to-tabs': 4*/
+});
+
+Prism.hooks.add('before-sanity-check', function (env) {
+	var Normalizer = Prism.plugins.NormalizeWhitespace;
+
+	// Check settings
+	if (env.settings && env.settings['whitespace-normalization'] === false) {
+		return;
+	}
+
+	// Simple mode if there is no env.element
+	if ((!env.element || !env.element.parentNode) && env.code) {
+		env.code = Normalizer.normalize(env.code, env.settings);
+		return;
+	}
+
+	// Normal mode
+	var pre = env.element.parentNode;
+	var clsReg = /\bno-whitespace-normalization\b/;
+	if (!env.code || !pre || pre.nodeName.toLowerCase() !== 'pre' ||
+			clsReg.test(pre.className) || clsReg.test(env.element.className))
+		return;
+
+	var children = pre.childNodes,
+	    before = '',
+	    after = '',
+	    codeFound = false;
+
+	// Move surrounding whitespace from the <pre> tag into the <code> tag
+	for (var i = 0; i < children.length; ++i) {
+		var node = children[i];
+
+		if (node == env.element) {
+			codeFound = true;
+		} else if (node.nodeName === "#text") {
+			if (codeFound) {
+				after += node.nodeValue;
+			} else {
+				before += node.nodeValue;
+			}
+
+			pre.removeChild(node);
+			--i;
+		}
+	}
+
+	if (!env.element.children.length || !Prism.plugins.KeepMarkup) {
+		env.code = before + env.code + after;
+		env.code = Normalizer.normalize(env.code, env.settings);
+	} else {
+		// Preserve markup for keep-markup plugin
+		var html = before + env.element.innerHTML + after;
+		env.element.innerHTML = Normalizer.normalize(html, env.settings);
+		env.code = env.element.textContent;
+	}
+});
+
+}());
+