michael@0: /**
michael@0:  * Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/publicdomain/zero/1.0/
michael@0:  */
michael@0: "use strict";
michael@0: 
michael@0: function messageListener(event) {
michael@0:   var exception;
michael@0:   try {
michael@0:     event.bubbles = true;
michael@0:   }
michael@0:   catch(e) {
michael@0:     exception = e;
michael@0:   }
michael@0: 
michael@0:   if (!(exception instanceof TypeError)) {
michael@0:     throw exception;
michael@0:   }
michael@0: 
michael@0:   switch (event.data) {
michael@0:     case "no-op":
michael@0:       break;
michael@0:     case "components":
michael@0:       postMessage(Components.toString());
michael@0:       break;
michael@0:     case "start":
michael@0:       for (var i = 0; i < 1000; i++) { }
michael@0:       postMessage("started");
michael@0:       break;
michael@0:     case "stop":
michael@0:       self.postMessage('no-op');
michael@0:       postMessage("stopped");
michael@0:       self.removeEventListener("message", messageListener, false);
michael@0:       break;
michael@0:     default:
michael@0:       throw 'Bad message: ' + event.data;
michael@0:   }
michael@0: }
michael@0: 
michael@0: if (!("DedicatedWorkerGlobalScope" in self)) {
michael@0:   throw new Error("DedicatedWorkerGlobalScope should be visible!");
michael@0: }
michael@0: if (!(self instanceof DedicatedWorkerGlobalScope)) {
michael@0:   throw new Error("The global should be a SharedWorkerGlobalScope!");
michael@0: }
michael@0: if (!(self instanceof WorkerGlobalScope)) {
michael@0:   throw new Error("The global should be a WorkerGlobalScope!");
michael@0: }
michael@0: if ("SharedWorkerGlobalScope" in self) {
michael@0:   throw new Error("SharedWorkerGlobalScope should not be visible!");
michael@0: }
michael@0: 
michael@0: addEventListener("message", { handleEvent: messageListener });