ServiceWorker: Implement updatefound event and version attributes (Chromium)

content/browser/service_worker/service_worker_registration_handle.h

+// Copyright 2014 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.
+
+#ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_HANDLE_H_
+#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_HANDLE_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "content/browser/service_worker/service_worker_registration.h"
+#include "content/browser/service_worker/service_worker_version.h"
+#include "content/common/service_worker/service_worker_types.h"
+
+namespace content {
+
+class ServiceWorkerContextCore;
+class ServiceWorkerDispatcherHost;
+class ServiceWorkerVersion;
+
+// Roughly Corresponds to one ServiceWorkerRegistration object in the renderer
+// process (WebServiceWorkerRegistrationImpl).
+// Has references to the corresponding ServiceWorkerRegistration and
+// ServiceWorkerVersions (therefore they're guaranteed to be alive while this
+// handle is around).
+class ServiceWorkerRegistrationHandle
+    : public ServiceWorkerRegistration::Listener {
+ public:
+  ServiceWorkerRegistrationHandle(
+      base::WeakPtr<ServiceWorkerContextCore> context,
+      ServiceWorkerDispatcherHost* dispatcher_host,
+      int provider_id,
+      ServiceWorkerRegistration* registration);
+  virtual ~ServiceWorkerRegistrationHandle();
+
+  bool HasNoRefCount() const { return ref_count_ <= 0; }
+  void IncrementRefCount();
+  void DecrementRefCount();
+
+  int provider_id() const { return provider_id_; }
+  int handle_id() const { return handle_id_; }
+
+  ServiceWorkerRegistration* registration() { return registration_.get(); }
+
+ private:
+  // ServiceWorkerRegistration::Listener overrides.
+  virtual void OnVersionAttributesChanged(
+      ServiceWorkerRegistration* registration,
+      ChangedVersionAttributesMask changed_mask,
+      const ServiceWorkerRegistrationInfo& info) OVERRIDE;
+  virtual void OnRegistrationFailed(
+      ServiceWorkerRegistration* registration) OVERRIDE;
+
+  // Sets the corresponding version field to the given version or if the given
+  // version is NULL, clears the field.
+  void SetVersionAttributes(
+      ServiceWorkerVersion* installing_version,
+      ServiceWorkerVersion* waiting_version,
+      ServiceWorkerVersion* active_version);
+
+  // Clears all version fields.
+  void ClearVersionAttributes();
+
+  ServiceWorkerObjectInfo CreateServiceWorkerHandleAndPass(
+      ServiceWorkerVersion* version);
+
+  base::WeakPtr<ServiceWorkerContextCore> context_;
+  ServiceWorkerDispatcherHost* dispatcher_host_;
+  const int provider_id_;
+  const int handle_id_;
+  int ref_count_;  // Created with 1.
+
+  scoped_refptr<ServiceWorkerRegistration> registration_;
+  scoped_refptr<ServiceWorkerVersion> installing_version_;
+  scoped_refptr<ServiceWorkerVersion> waiting_version_;
+  scoped_refptr<ServiceWorkerVersion> active_version_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegistrationHandle);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_HANDLE_H_