Added RDF Turtle/TriG language (#2012)

This adds support for the RDF Turtle/TriG language.

components.json

@@ -897,6 +897,14 @@
 			"require": ["clike", "markup-templating"],
 			"owner": "gflohr"
 		},
+		"turtle": {
+			"title": "Turtle",
+			"alias": ["trig"],
+			"aliasTitles": {
+				"trig": "TriG"
+			},
+			"owner": "jakubklimek"
+		},
 		"twig": {
 			"title": "Twig",
 			"require": "markup",

components/prism-turtle.js

@@ -0,0 +1,54 @@
+Prism.languages.turtle = {
+	'comment': {
+		pattern: /#.*/,
+		greedy: true
+	},
+	'multiline-string': {
+		pattern: /"""(?:[^"]"?"?)*"""|'''(?:[^']'?'?)*'''/,
+		greedy: true,
+		alias: 'string',
+		inside: {
+			'comment': /#.*/
+		}
+	},
+	'string': {
+		pattern: /"(?:[^\\"\r\n]|\\.)*"|'(?:[^\\'\r\n]|\\.)*'/,
+		greedy: true
+	},
+	'url': {
+		pattern: /<[^\s<>]*>/,
+		greedy: true,
+		inside: {
+			'punctuation': /[<>]/
+		}
+	},
+	'function': {
+		pattern: /(?:(?![-.\d\xB7])[-.\w\xB7\xC0-\uFFFD]+)?:(?:(?![-.])(?:[-.:\w\xC0-\uFFFD]|%[\da-f]{2}|\\.)+)?/i,
+		inside: {
+			'local-name': {
+				pattern: /([^:]*:)[\s\S]+/,
+				lookbehind: true
+			},
+			'prefix': {
+				pattern: /[\s\S]+/,
+				inside: {
+					'punctuation': /:/
+				}
+			}
+		}
+	},
+	'number': /[+-]?\b\d+\.?\d*(?:e[+-]?\d+)?/i,
+	'punctuation': /[{}.,;()[\]]|\^\^/,
+	'boolean': /\b(?:true|false)\b/,
+	'keyword': [
+		/(?:\ba|@prefix|@base)\b|=/,
+		/\b(?:graph|base|prefix)\b|=/i
+	],
+	'tag': {
+		'pattern': /@[a-z]+(?:-[a-z\d]+)*/i,
+		inside: {
+			'punctuation': /@/
+		}
+	}
+};
+Prism.languages.trig = Prism.languages['turtle'];

examples/prism-turtle.html

@@ -0,0 +1,18 @@
+<h2>Full example</h2>
+<pre><code>@base &lt;http://example.org/&gt; .
+@prefix rdf: &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#&gt; .
+@prefix rdfs: &lt;http://www.w3.org/2000/01/rdf-schema#&gt; .
+@prefix foaf: &lt;http://xmlns.com/foaf/0.1/&gt; .
+@prefix rel: &lt;http://www.perceive.net/schemas/relationship/&gt; .
+
+GRAPH &lt;urn:myGraph&gt; {
+&lt;#green-goblin&gt;
+    rel:enemyOf &lt;#spiderman&gt; ;
+    a foaf:Person ;    # in the context of the Marvel universe
+    foaf:name "Green Goblin" .
+
+&lt;#spiderman&gt;
+    rel:enemyOf &lt;#green-goblin&gt; ;
+    a foaf:Person ;
+    foaf:name "Spiderman", "Человек-паук"@ru .
+}</code></pre>

plugins/autoloader/prism-autoloader.js

@@ -151,6 +151,7 @@
 		"px": "pcaxis",
 		"py": "python",
 		"rb": "ruby",
+		"trig": "turtle",
 		"ts": "typescript",
 		"t4": "t4-cs",
 		"vb": "visual-basic",

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

@@ -126,6 +126,7 @@
 		"tap": "TAP",
 		"toml": "TOML",
 		"tt2": "Template Toolkit 2",
+		"trig": "TriG",
 		"ts": "TypeScript",
 		"t4-cs": "T4 Text Templates (C#)",
 		"t4": "T4 Text Templates (C#)",

tests/languages/turtle/blank-node_feature.test

@@ -0,0 +1,75 @@
+<http://www.w3.org/TR/rdf-syntax-grammar> <http://purl.org/dc/elements/1.1/title> "RDF/XML Syntax Specification (Revised)" .
+ <http://www.w3.org/TR/rdf-syntax-grammar> <http://example.org/stuff/1.0/editor> _:bnode .
+ _:bnode <http://example.org/stuff/1.0/fullname> "Dave Beckett" .
+ _:bnode <http://example.org/stuff/1.0/homePage> <http://purl.org/net/dajobe/> .
+
+----------------------------------------------------
+
+[
+	["url", [
+		["punctuation", "<"],
+		"http://www.w3.org/TR/rdf-syntax-grammar",
+		["punctuation", ">"]
+	]],
+	["url", [
+		["punctuation", "<"],
+		"http://purl.org/dc/elements/1.1/title",
+		["punctuation", ">"]
+	]],
+	["string", "\"RDF/XML Syntax Specification (Revised)\""],
+	["punctuation", "."],
+	["url", [
+		["punctuation", "<"],
+		"http://www.w3.org/TR/rdf-syntax-grammar",
+		["punctuation", ">"]
+	]],
+	["url", [
+		["punctuation", "<"],
+		"http://example.org/stuff/1.0/editor",
+		["punctuation", ">"]
+	]],
+	["function", [
+		["prefix", [
+			"_",
+			["punctuation", ":"]
+		]],
+		["local-name", "bnode"]
+	]],
+	["punctuation", "."],
+	["function", [
+		["prefix", [
+			"_",
+			["punctuation", ":"]
+		]],
+		["local-name", "bnode"]
+	]],
+	["url", [
+		["punctuation", "<"],
+		"http://example.org/stuff/1.0/fullname",
+		["punctuation", ">"]
+	]],
+	["string", "\"Dave Beckett\""],
+	["punctuation", "."],
+	["function", [
+		["prefix", [
+			"_",
+			["punctuation", ":"]
+		]],
+		["local-name", "bnode"]
+	]],
+	["url", [
+		["punctuation", "<"],
+		"http://example.org/stuff/1.0/homePage",
+		["punctuation", ">"]
+	]],
+	["url", [
+		["punctuation", "<"],
+		"http://purl.org/net/dajobe/",
+		["punctuation", ">"]
+	]],
+	["punctuation", "."]
+]
+
+----------------------------------------------------
+
+Checks blank node underscore prefixes.