[fsp] Add notifications in case of slow operations.

chrome/browser/chromeos/file_system_provider/notification_manager.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 CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_NOTIFICATION_MANAGER_H_
+#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_NOTIFICATION_MANAGER_H_
+
+#include <map>
+#include <string>
+
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/chromeos/file_system_provider/notification_manager_interface.h"
+#include "chrome/browser/chromeos/file_system_provider/provided_file_system_info.h"
+#include "chrome/browser/extensions/app_icon_loader.h"
+
+class Profile;
+
+namespace gfx {
+class Image;
+class ImageSkia;
+}  // message gfx
+
+namespace message_center {
+class Notification;
+}  // namespace message_center
+
+namespace chromeos {
+namespace file_system_provider {
+
+// Provided file systems's manager for showing notifications. Shows always
+// up to one notification. If more than one request is unresponsive, then
+// all of them will be aborted when clicking on the notification button.
+class NotificationManager : public NotificationManagerInterface,
+                            public extensions::AppIconLoader::Delegate {
+ public:
+  NotificationManager(Profile* profile,
+                      const ProvidedFileSystemInfo& file_system_info);
+  virtual ~NotificationManager();
+
+  // NotificationManagerInterface overrides:
+  virtual void ShowUnresponsiveNotification(
+      int id,
+      const NotificationCallback& callback) OVERRIDE;
+  virtual void HideUnresponsiveNotification(int id) OVERRIDE;
+
+  // Invoked when a button on the notification is clicked.
+  void OnButtonClick(int button_index);
+
+  // Invoked when the notification failed to show up.
+  void OnError();
+
+  // Invoked when the notification got closed either by user or by system.
+  void OnClose();
+
+  // extensions::AppIconLoader::Delegate overrides:
+  virtual void SetAppImage(const std::string& id,
+                           const gfx::ImageSkia& image) OVERRIDE;
+
+ private:
+  typedef std::map<int, NotificationCallback> CallbackMap;
+
+  // Creates a notification object for the actual state of the manager.
+  scoped_ptr<message_center::Notification> CreateNotification();
+
+  // Handles a notification result by calling all registered callbacks and
+  // clearing the list.
+  void OnNotificationResult(NotificationResult result);
+
+  Profile* profile_;  // Not owned.
+  ProvidedFileSystemInfo file_system_info_;
+  CallbackMap callbacks_;
+  scoped_ptr<extensions::AppIconLoader> icon_loader_;
+  scoped_ptr<gfx::Image> extension_icon_;
+
+  DISALLOW_COPY_AND_ASSIGN(NotificationManager);
+};
+
+}  // namespace file_system_provider
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_NOTIFICATION_MANAGER_H_