Core: Provide a way to load Prism from inside a Worker without listening to messages. (#1188)

Using disableWorkerMessageHandler config.

Author: Golmote

components/prism-core.js

@@ -20,6 +20,7 @@ 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) {
@@ -481,18 +482,21 @@ if (!_self.document) {
 		// in Node.js
 		return _self.Prism;
 	}
- 	// 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);
+
+	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;
 }

components/prism-core.min.js

@@ -25,6 +25,7 @@ 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) {
@@ -486,18 +487,21 @@ if (!_self.document) {
 		// in Node.js
 		return _self.Prism;
 	}
- 	// 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);
+
+	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;
 }