Added support for Apache Avro IDL (#3051)

components.json

@@ -160,6 +160,11 @@
 			"title": "AutoIt",
 			"owner": "Golmote"
 		},
+		"avro-idl": {
+			"title":"Avro IDL",
+			"alias": "avdl",
+			"owner": "RunDevelopment"
+		},
 		"bash": {
 			"title": "Bash",
 			"alias": "shell",

components/prism-avro-idl.js

@@ -0,0 +1,57 @@
+// GitHub: https://github.com/apache/avro
+// Docs: https://avro.apache.org/docs/current/idl.html
+
+Prism.languages['avro-idl'] = {
+	'comment': {
+		pattern: /\/\/.*|\/\*[\s\S]*?\*\//,
+		greedy: true
+	},
+	'string': [
+		{
+			pattern: /(^|[^\\])"(?:[^\r\n"\\]|\\.)*"/,
+			lookbehind: true,
+			greedy: true
+		},
+		{
+			pattern: /(^|[^\\])'(?:[^\r\n'\\]|\\(?:[\s\S]|\d{1,3}))'/,
+			lookbehind: true,
+			greedy: true
+		}
+	],
+
+	'annotation': {
+		pattern: /@(?:[$\w.-]|`[^\r\n`]+`)+/,
+		greedy: true,
+		alias: 'function'
+	},
+	'function-identifier': {
+		pattern: /`[^\r\n`]+`(?=\s*\()/,
+		greedy: true,
+		alias: 'function'
+	},
+	'identifier': {
+		pattern: /`[^\r\n`]+`/,
+		greedy: true
+	},
+
+	'class-name': {
+		pattern: /(\b(?:enum|error|protocol|record|throws)\b\s+)[$\w]+/,
+		lookbehind: true,
+		greedy: true
+	},
+	'keyword': /\b(?:array|boolean|bytes|date|decimal|double|enum|error|false|fixed|float|idl|import|int|local_timestamp_ms|long|map|null|oneway|protocol|record|schema|string|throws|time_ms|timestamp_ms|true|union|uuid|void)\b/,
+	'function': /\b[a-z_]\w*(?=\s*\()/i,
+
+	'number': [
+		{
+			pattern: /(^|[^\w.])-?(?:(?:\d+(?:\.\d*)?|\.\d+)(?:e[+-]?\d+)?|0x(?:[a-f0-9]+(?:\.[a-f0-9]*)?|\.[a-f0-9]+)(?:p[+-]?\d+)?)[dfl]?(?![\w.])/i,
+			lookbehind: true
+		},
+		/-?\b(?:NaN|Infinity)\b/
+	],
+
+	'operator': /=/,
+	'punctuation': /[()\[\]{}<>.:,;-]/
+};
+
+Prism.languages.avdl = Prism.languages['avro-idl'];

examples/prism-avro-idl.html

@@ -0,0 +1,44 @@
+<h2>Full example</h2>
+<pre><code>// Source: https://avro.apache.org/docs/current/idl.html#example
+
+/**
+ * An example protocol in Avro IDL
+ */
+@namespace("org.apache.avro.test")
+protocol Simple {
+
+	@aliases(["org.foo.KindOf"])
+	enum Kind {
+		FOO,
+		BAR, // the bar enum value
+		BAZ
+	}
+
+	fixed MD5(16);
+
+	record TestRecord {
+		@order("ignore")
+		string name;
+
+		@order("descending")
+		Kind kind;
+
+		MD5 hash;
+
+		union { MD5, null} @aliases(["hash"]) nullableHash;
+
+		array&lt;long> arrayOfLongs;
+	}
+
+	error TestError {
+		string message;
+	}
+
+	string hello(string greeting);
+	TestRecord echo(TestRecord `record`);
+	int add(int arg1, int arg2);
+	bytes echoBytes(bytes data);
+	void `error`() throws TestError;
+	void ping() oneway;
+}
+</code></pre>

plugins/autoloader/prism-autoloader.js

@@ -172,6 +172,7 @@
 		"js": "javascript",
 		"g4": "antlr4",
 		"adoc": "asciidoc",
+		"avdl": "avro-idl",
 		"shell": "bash",
 		"shortcode": "bbcode",
 		"rbnf": "bnf",

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

@@ -43,6 +43,8 @@
 		"asm6502": "6502 Assembly",
 		"autohotkey": "AutoHotkey",
 		"autoit": "AutoIt",
+		"avro-idl": "Avro IDL",
+		"avdl": "Avro IDL",
 		"basic": "BASIC",
 		"bbcode": "BBcode",
 		"bnf": "BNF",