ServiceWorker: Issue a warning after initial execution of worker script

Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 47 matching lines @@
     RefPtrWillBeRawPtr<ServiceWorkerGlobalScope> context = adoptRefWillBeNoop(new ServiceWorkerGlobalScope(startupData->m_scriptURL, startupData->m_userAgent, thread, monotonicallyIncreasingTime(), startupData->m_starterOrigin, startupData->m_workerClients.release()));
 
     context->applyContentSecurityPolicyFromString(startupData->m_contentSecurityPolicy, startupData->m_contentSecurityPolicyType);
 
     return context.release();
 }
 
 ServiceWorkerGlobalScope::ServiceWorkerGlobalScope(const KURL& url, const String& userAgent, ServiceWorkerThread* thread, double timeOrigin, const SecurityOrigin* starterOrigin, PassOwnPtrWillBeRawPtr<WorkerClients> workerClients)
     : WorkerGlobalScope(url, userAgent, thread, timeOrigin, starterOrigin, workerClients)
     , m_fetchManager(adoptPtr(new FetchManager(this)))
+    , m_didEvaluateScript(false)
 {
 }
 
 ServiceWorkerGlobalScope::~ServiceWorkerGlobalScope()
 {
 }
 
+void ServiceWorkerGlobalScope::didEvaluateWorkerScript()
+{
+    m_didEvaluateScript = true;
+}
+
 void ServiceWorkerGlobalScope::stopFetch()
 {
     m_fetchManager.clear();
 }
 
 String ServiceWorkerGlobalScope::scope(ExecutionContext* context)
 {
     return ServiceWorkerGlobalScopeClient::from(context)->scope().string();
 }
 
@@ skipping 73 matching lines @@
     if (!m_clients)
         m_clients = ServiceWorkerClients::create();
     return m_clients;
 }
 
 void ServiceWorkerGlobalScope::close(ExceptionState& exceptionState)
 {
     exceptionState.throwDOMException(InvalidAccessError, "Not supported.");
 }
 
+bool ServiceWorkerGlobalScope::addEventListener(const AtomicString& eventType, PassRefPtr<EventListener> listener, bool useCapture)
+{
+    if (m_didEvaluateScript) {
+        if (eventType == EventTypeNames::install) {
+            RefPtrWillBeRawPtr<ConsoleMessage> consoleMessage = ConsoleMessage::create(JSMessageSource, WarningMessageLevel, "Event handler of 'install' event must be added on the initial evaluation of worker script.");
+            addMessageToWorkerConsole(consoleMessage.release());
+        } else if (eventType == EventTypeNames::activate) {
+            RefPtrWillBeRawPtr<ConsoleMessage> consoleMessage = ConsoleMessage::create(JSMessageSource, WarningMessageLevel, "Event handler of 'activate' event must be added on the initial evaluation of worker script.");
+            addMessageToWorkerConsole(consoleMessage.release());
+        }
+    }
+    return WorkerGlobalScope::addEventListener(eventType, listener, useCapture);
+}
+
 const AtomicString& ServiceWorkerGlobalScope::interfaceName() const
 {
     return EventTargetNames::ServiceWorkerGlobalScope;
 }
 
 void ServiceWorkerGlobalScope::trace(Visitor* visitor)
 {
     visitor->trace(m_clients);
     visitor->trace(m_caches);
     WorkerGlobalScope::trace(visitor);
@@ skipping 12 matching lines @@
 void ServiceWorkerGlobalScope::logExceptionToConsole(const String& errorMessage, int scriptId, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtrWillBeRawPtr<ScriptCallStack> callStack)
 {
     WorkerGlobalScope::logExceptionToConsole(errorMessage, scriptId, sourceURL, lineNumber, columnNumber, callStack);
     RefPtrWillBeRawPtr<ConsoleMessage> consoleMessage = ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, errorMessage, sourceURL, lineNumber);
     consoleMessage->setScriptId(scriptId);
     consoleMessage->setCallStack(callStack);
     addMessageToWorkerConsole(consoleMessage.release());
 }
 
 } // namespace blink