Populate .current when navigator.serviceWorker is accessed

content/child/service_worker/web_service_worker_provider_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/child/service_worker/web_service_worker_provider_impl.h"
 
 #include "base/atomic_sequence_num.h"
 #include "base/logging.h"
 #include "content/child/child_thread.h"
+#include "content/child/service_worker/scoped_service_worker_reference.h"
 #include "content/child/service_worker/service_worker_dispatcher.h"
+#include "content/child/service_worker/service_worker_provider_context.h"
+#include "content/child/service_worker/web_service_worker_impl.h"
 #include "content/child/thread_safe_sender.h"
+#include "content/child/worker_task_runner.h"
+#include "content/common/service_worker/service_worker_messages.h"
+#include "third_party/WebKit/public/platform/WebServiceWorkerProviderClient.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 
 using blink::WebURL;
 
 namespace content {
 
+namespace {
+
+int CurrentWorkerId() {
+  return WorkerTaskRunner::Instance()->CurrentWorkerId();
+}
+
+}  // namespace
+
 WebServiceWorkerProviderImpl::WebServiceWorkerProviderImpl(
     ThreadSafeSender* thread_safe_sender,
-    int provider_id)
+    ServiceWorkerProviderContext* context)
     : thread_safe_sender_(thread_safe_sender),
-      provider_id_(provider_id) {
+      context_(context),
+      provider_id_(context->provider_id()) {
 }
 
 WebServiceWorkerProviderImpl::~WebServiceWorkerProviderImpl() {
   // Make sure the script client is removed.
   RemoveScriptClient();
 }
 
 void WebServiceWorkerProviderImpl::setClient(
     blink::WebServiceWorkerProviderClient* client) {
-  if (client)
-    GetDispatcher()->AddScriptClient(provider_id_, client);
-  else
+  if (!client) {
     RemoveScriptClient();
+    return;
+  }
+
+  scoped_ptr<ScopedServiceWorkerReference> current;
+  context_->AddProviderThreadAndGetInitializationInfo(
+      CurrentWorkerId(), &current);
+  GetDispatcher()->AddScriptClient(provider_id_, client);
+  if (!current)
+    return;
+
+  int handle_id = current->info().handle_id;
+  if (handle_id != kInvalidServiceWorkerHandleId) {
+    scoped_ptr<WebServiceWorkerImpl> worker(
+        new WebServiceWorkerImpl(current.Pass(), thread_safe_sender_));
+    client->setCurrentServiceWorker(worker.release());
+  }
 }
 
 void WebServiceWorkerProviderImpl::registerServiceWorker(
     const WebURL& pattern,
     const WebURL& script_url,
     WebServiceWorkerCallbacks* callbacks) {
   GetDispatcher()->RegisterServiceWorker(
       provider_id_, pattern, script_url, callbacks);
 }
 
 void WebServiceWorkerProviderImpl::unregisterServiceWorker(
     const WebURL& pattern,
     WebServiceWorkerCallbacks* callbacks) {
   GetDispatcher()->UnregisterServiceWorker(
       provider_id_, pattern, callbacks);
 }
 
 void WebServiceWorkerProviderImpl::RemoveScriptClient() {
   // Remove the script client, but only if the dispatcher is still there.
   // (For cleanup path we don't need to bother creating a new dispatcher)
   ServiceWorkerDispatcher* dispatcher =
       ServiceWorkerDispatcher::GetThreadSpecificInstance();
   if (dispatcher)
     dispatcher->RemoveScriptClient(provider_id_);
+  context_->RemoveProviderThread(CurrentWorkerId());
 }
 
 ServiceWorkerDispatcher* WebServiceWorkerProviderImpl::GetDispatcher() {
   return ServiceWorkerDispatcher::GetOrCreateThreadSpecificInstance(
       thread_safe_sender_);
 }
 
 }  // namespace content