Show Language plugin alias support and improvements (#1683)

Adds support for aliases and optimizes the name guessing.

gulpfile.js

@@ -76,19 +76,49 @@ gulp.task('languages-plugins', function (cb) {
 	componentsPromise.then(function (data) {
 		var languagesMap = {};
 		var dependenciesMap = {};
+
+		/**
+		 * Tries to guess the name of a language given its id.
+		 *
+		 * From `prism-show-language.js`.
+		 *
+		 * @param {string} id The language id.
+		 * @returns {string}
+		 */
+		function guessTitle(id) {
+			if (!id) {
+				return id;
+			}
+			return (id.substring(0, 1).toUpperCase() + id.substring(1)).replace(/s(?=cript)/, 'S');
+		}
+
+		function addLanguageTitle(key, title) {
+			if (!languagesMap[key] && guessTitle(key) !== title) {
+				languagesMap[key] = title;
+			}
+		}
+
 		for (var p in data.languages) {
 			if (p !== 'meta') {
 				var title = data.languages[p].displayTitle || data.languages[p].title;
-				var ucfirst = p.substring(0, 1).toUpperCase() + p.substring(1);
-				if (title !== ucfirst) {
-					languagesMap[p] = title;
-				}
+
+				addLanguageTitle(p, title);
 
 				for (var name in data.languages[p].aliasTitles) {
-					languagesMap[name] = data.languages[p].aliasTitles[name];
+					addLanguageTitle(name, data.languages[p].aliasTitles[name]);
+				}
+
+				if (data.languages[p].alias) {
+					if (typeof data.languages[p].alias === 'string') {
+						addLanguageTitle(data.languages[p].alias, title);
+					} else {
+						data.languages[p].alias.forEach(function (alias) {
+							addLanguageTitle(alias, title);
+						});
+					}
 				}
 
-				if(data.languages[p].require) {
+				if (data.languages[p].require) {
 					dependenciesMap[p] = data.languages[p].require;
 				}
 			}

plugins/show-language/prism-show-language.js

@@ -11,13 +11,28 @@ if (!Prism.plugins.toolbar) {
 }
 
 // The languages map is built automatically with gulp
-var Languages = /*languages_placeholder[*/{"html":"HTML","xml":"XML","svg":"SVG","mathml":"MathML","css":"CSS","clike":"C-like","javascript":"JavaScript","abap":"ABAP","actionscript":"ActionScript","apacheconf":"Apache Configuration","apl":"APL","applescript":"AppleScript","arff":"ARFF","asciidoc":"AsciiDoc","asm6502":"6502 Assembly","aspnet":"ASP.NET (C#)","autohotkey":"AutoHotkey","autoit":"AutoIt","shell":"Shell","basic":"BASIC","csharp":"C#","cpp":"C++","cil":"CIL","coffeescript":"CoffeeScript","csp":"Content-Security-Policy","css-extras":"CSS Extras","django":"Django/Jinja2","erb":"ERB","fsharp":"F#","gcode":"G-code","gedcom":"GEDCOM","glsl":"GLSL","gml":"GameMaker Language","graphql":"GraphQL","hcl":"HCL","http":"HTTP","hpkp":"HTTP Public-Key-Pins","hsts":"HTTP Strict-Transport-Security","ichigojam":"IchigoJam","inform7":"Inform 7","javastacktrace":"Java stack trace","json":"JSON","jsonp":"JSONP","latex":"LaTeX","livescript":"LiveScript","lolcode":"LOLCODE","markup-templating":"Markup templating","matlab":"MATLAB","mel":"MEL","n1ql":"N1QL","n4js":"N4JS","nand2tetris-hdl":"Nand To Tetris HDL","nasm":"NASM","nginx":"nginx","nsis":"NSIS","objectivec":"Objective-C","ocaml":"OCaml","opencl":"OpenCL","parigp":"PARI/GP","objectpascal":"Object Pascal","php":"PHP","php-extras":"PHP Extras","plsql":"PL/SQL","powershell":"PowerShell","properties":".properties","protobuf":"Protocol Buffers","q":"Q (kdb+ database)","jsx":"React JSX","tsx":"React TSX","renpy":"Ren'py","rest":"reST (reStructuredText)","sas":"SAS","sass":"Sass (Sass)","scss":"Sass (Scss)","sql":"SQL","soy":"Soy (Closure Template)","tap":"TAP","toml":"TOML","tt2":"Template Toolkit 2","typescript":"TypeScript","vbnet":"VB.Net","vhdl":"VHDL","vim":"vim","visual-basic":"Visual Basic","wasm":"WebAssembly","wiki":"Wiki markup","xeoracube":"XeoraCube","xojo":"Xojo (REALbasic)","xquery":"XQuery","yaml":"YAML"}/*]*/;
+var Languages = /*languages_placeholder[*/{"html":"HTML","xml":"XML","svg":"SVG","mathml":"MathML","css":"CSS","clike":"C-like","js":"JavaScript","abap":"ABAP","apacheconf":"Apache Configuration","apl":"APL","arff":"ARFF","asciidoc":"AsciiDoc","adoc":"AsciiDoc","asm6502":"6502 Assembly","aspnet":"ASP.NET (C#)","autohotkey":"AutoHotkey","autoit":"AutoIt","shell":"Bash","basic":"BASIC","csharp":"C#","dotnet":"C#","cpp":"C++","cil":"CIL","csp":"Content-Security-Policy","css-extras":"CSS Extras","django":"Django/Jinja2","jinja2":"Django/Jinja2","dockerfile":"Docker","erb":"ERB","fsharp":"F#","gcode":"G-code","gedcom":"GEDCOM","glsl":"GLSL","gml":"GameMaker Language","gamemakerlanguage":"GameMaker Language","graphql":"GraphQL","hcl":"HCL","http":"HTTP","hpkp":"HTTP Public-Key-Pins","hsts":"HTTP Strict-Transport-Security","ichigojam":"IchigoJam","inform7":"Inform 7","javastacktrace":"Java stack trace","json":"JSON","jsonp":"JSONP","latex":"LaTeX","emacs":"Lisp","elisp":"Lisp","emacs-lisp":"Lisp","lolcode":"LOLCODE","markup-templating":"Markup templating","matlab":"MATLAB","mel":"MEL","n1ql":"N1QL","n4js":"N4JS","n4jsd":"N4JS","nand2tetris-hdl":"Nand To Tetris HDL","nasm":"NASM","nginx":"nginx","nsis":"NSIS","objectivec":"Objective-C","ocaml":"OCaml","opencl":"OpenCL","parigp":"PARI/GP","objectpascal":"Object Pascal","php":"PHP","php-extras":"PHP Extras","plsql":"PL/SQL","powershell":"PowerShell","properties":".properties","protobuf":"Protocol Buffers","q":"Q (kdb+ database)","jsx":"React JSX","tsx":"React TSX","renpy":"Ren'py","rest":"reST (reStructuredText)","sas":"SAS","sass":"Sass (Sass)","scss":"Sass (Scss)","sql":"SQL","soy":"Soy (Closure Template)","tap":"TAP","toml":"TOML","tt2":"Template Toolkit 2","ts":"TypeScript","vbnet":"VB.Net","vhdl":"VHDL","vim":"vim","visual-basic":"Visual Basic","vb":"Visual Basic","wasm":"WebAssembly","wiki":"Wiki markup","xeoracube":"XeoraCube","xojo":"Xojo (REALbasic)","xquery":"XQuery","yaml":"YAML"}/*]*/;
+
 Prism.plugins.toolbar.registerButton('show-language', function(env) {
 	var pre = env.element.parentNode;
 	if (!pre || !/pre/i.test(pre.nodeName)) {
 		return;
 	}
-	var language = pre.getAttribute('data-language') || Languages[env.language] || (env.language && (env.language.substring(0, 1).toUpperCase() + env.language.substring(1)));
+
+	/**
+	 * Tries to guess the name of a language given its id.
+	 *
+	 * @param {string} id The language id.
+	 * @returns {string}
+	 */
+	function guessTitle(id) {
+		if (!id) {
+			return id;
+		}
+		return (id.substring(0, 1).toUpperCase() + id.substring(1)).replace(/s(?=cript)/, 'S');
+	}
+
+	var language = pre.getAttribute('data-language') || Languages[env.language] || guessTitle(env.language);
 
 	if(!language) {
 		return;