Add support for Flow

Fix #1216

components.js

@@ -202,6 +202,11 @@ var components = {
 			"require": "clike",
 			"owner": "simonreynolds7"
 		},
+		"flow": {
+			"title": "Flow",
+			"require": "javascript",
+			"owner": "Golmote"
+		},
 		"fortran": {
 			"title": "Fortran",
 			"owner": "Golmote"

components/prism-flow.js

@@ -0,0 +1,34 @@
+(function (Prism) {
+	Prism.languages.flow = Prism.languages.extend('javascript', {});
+
+	Prism.languages.insertBefore('flow', 'keyword', {
+		'type': [
+			{
+				pattern: /\b(?:[Nn]umber|[Ss]tring|[Bb]oolean|Function|any|mixed|null|void)\b/,
+				alias: 'tag'
+			}
+		]
+	});
+	Prism.languages.flow['function-variable'].pattern = /[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*(?=\s*=\s*(?:function\b|(?:\([^()]*\)(?:\s*:\s*\w+)?|[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*)\s*=>))/i;
+
+	Prism.languages.insertBefore('flow', 'operator', {
+		'flow-punctuation': {
+			pattern: /\{\||\|\}/,
+			alias: 'punctuation'
+		}
+	});
+
+	if (Prism.util.type(Prism.languages.flow.keyword) !== 'Array') {
+		Prism.languages.flow.keyword = [Prism.languages.flow.keyword];
+	}
+	Prism.languages.flow.keyword.unshift(
+		{
+			pattern: /(^|[^$]\b)(?:type|opaque|declare|Class)\b(?!\$)/,
+			lookbehind: true
+		},
+		{
+			pattern: /(^|[^$]\B)\$(?:await|Diff|Exact|Keys|ObjMap|PropertyType|Shape|Record|Supertype|Subtype|Enum)\b(?!\$)/,
+			lookbehind: true
+		}
+	);
+}(Prism));

examples/prism-flow.html

@@ -0,0 +1,21 @@
+<h1>Flow</h1>
+<p>To use this language, use the class "language-flow".</p>
+
+<h2>Primitive types</h2>
+<pre><code>function method(x: number, y: string, z: boolean) {}
+function stringifyBasicValue(value: string | number) {}
+function add(one: any, two: any): number {
+  return one + two;
+}
+
+const bar: number = 2;
+var barVar: number = 2;
+let barLet: number = 2;
+let isOneOf: number | boolean | string = foo;</code></pre>
+
+<h2>Keywords</h2>
+<pre><code>type UnionAlias = 1 | 2 | 3;
+opaque type ID = string;
+declare opaque type PositiveNumber: number;
+type Country = $Keys&lt;typeof countries>;
+type RequiredProps = $Diff&lt;Props, DefaultProps>;</code></pre>

plugins/autoloader/prism-autoloader.js

@@ -4,7 +4,7 @@
 	}
 
 	// The dependencies map is built automatically with gulp
-	var lang_dependencies = /*languages_placeholder[*/{"javascript":"clike","actionscript":"javascript","arduino":"cpp","aspnet":"markup","bison":"c","c":"clike","csharp":"clike","cpp":"c","coffeescript":"javascript","crystal":"ruby","css-extras":"css","d":"clike","dart":"clike","django":"markup","fsharp":"clike","glsl":"clike","go":"clike","groovy":"clike","haml":"ruby","handlebars":"markup","haxe":"clike","java":"clike","jolie":"clike","kotlin":"clike","less":"css","markdown":"markup","n4js":"javascript","nginx":"clike","objectivec":"c","opencl":"cpp","parser":"markup","php":"clike","php-extras":"php","processing":"clike","protobuf":"clike","pug":"javascript","qore":"clike","jsx":["markup","javascript"],"reason":"clike","ruby":"clike","sass":"css","scss":"css","scala":"java","smarty":"markup","swift":"clike","textile":"markup","twig":"markup","typescript":"javascript","vbnet":"basic","wiki":"markup"}/*]*/;
+	var lang_dependencies = /*languages_placeholder[*/{"javascript":"clike","actionscript":"javascript","arduino":"cpp","aspnet":"markup","bison":"c","c":"clike","csharp":"clike","cpp":"c","coffeescript":"javascript","crystal":"ruby","css-extras":"css","d":"clike","dart":"clike","django":"markup","fsharp":"clike","flow":"javascript","glsl":"clike","go":"clike","groovy":"clike","haml":"ruby","handlebars":"markup","haxe":"clike","java":"clike","jolie":"clike","kotlin":"clike","less":"css","markdown":"markup","n4js":"javascript","nginx":"clike","objectivec":"c","opencl":"cpp","parser":"markup","php":"clike","php-extras":"php","processing":"clike","protobuf":"clike","pug":"javascript","qore":"clike","jsx":["markup","javascript"],"reason":"clike","ruby":"clike","sass":"css","scss":"css","scala":"java","smarty":"markup","swift":"clike","textile":"markup","twig":"markup","typescript":"javascript","vbnet":"basic","wiki":"markup"}/*]*/;
 
 	var lang_data = {};
 

tests/languages/flow/flow-punctuation_feature.test

@@ -0,0 +1,12 @@
+{| foo : string |}
+
+----------------------------------------------------
+
+[
+	["flow-punctuation", "{|"], " foo ", ["punctuation", ":"],
+	["type", "string"], ["flow-punctuation", "|}"]
+]
+
+----------------------------------------------------
+
+Checks for Flow specific punctuation.

tests/languages/flow/function-variable_feature.test

@@ -0,0 +1,20 @@
+foo = (a: number) : number => {}
+bar = () : string => {}
+
+----------------------------------------------------
+
+[
+	["function-variable", "foo"], ["operator", "="],
+	["punctuation", "("], "a", ["punctuation", ":"],
+	["type", "number"], ["punctuation", ")"],
+	["punctuation", ":"], ["type", "number"],
+	["operator", "=>"], ["punctuation", "{"], ["punctuation", "}"],
+	["function-variable", "bar"], ["operator", "="],
+	["punctuation", "("], ["punctuation", ")"],
+	["punctuation", ":"], ["type", "string"],
+	["operator", "=>"], ["punctuation", "{"], ["punctuation", "}"]
+]
+
+----------------------------------------------------
+
+Checks for function variables containing types.

tests/languages/flow/keyword_feature.test

@@ -0,0 +1,39 @@
+type
+opaque
+declare
+Class
+$await
+$Diff
+$Exact
+$Keys
+$ObjMap
+$PropertyType
+$Shape
+$Record
+$Supertype
+$Subtype
+$Enum
+
+----------------------------------------------------
+
+[
+	["keyword", "type"],
+	["keyword", "opaque"],
+	["keyword", "declare"],
+	["keyword", "Class"],
+	["keyword", "$await"],
+	["keyword", "$Diff"],
+	["keyword", "$Exact"],
+	["keyword", "$Keys"],
+	["keyword", "$ObjMap"],
+	["keyword", "$PropertyType"],
+	["keyword", "$Shape"],
+	["keyword", "$Record"],
+	["keyword", "$Supertype"],
+	["keyword", "$Subtype"],
+	["keyword", "$Enum"]
+]
+
+----------------------------------------------------
+
+Checks for keywords.

tests/languages/flow/type_feature.test

@@ -0,0 +1,31 @@
+Number
+number
+String
+string
+Boolean
+boolean
+Function
+any
+mixed
+null
+void
+
+----------------------------------------------------
+
+[
+	["type", "Number"],
+	["type", "number"],
+	["type", "String"],
+	["type", "string"],
+	["type", "Boolean"],
+	["type", "boolean"],
+	["type", "Function"],
+	["type", "any"],
+	["type", "mixed"],
+	["type", "null"],
+	["type", "void"]
+]
+
+----------------------------------------------------
+
+Checks for types.