chrome/browser/chromeos/extensions/file_manager/mounted_disk_monitor.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_MOUNTED_DISK_MONITOR_H_
   6 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_MOUNTED_DISK_MONITOR_H_
   7
   8 #include <map>
   9 #include <set>
  10 #include <string>
  11
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "chromeos/dbus/power_manager_client.h"
  15 #include "chromeos/disks/disk_mount_manager.h"
  16
  17 namespace file_manager {
  18
  19 // Observes PowerManager and updates its state when the system suspends and
  20 // resumes. After the system resumes it will stay in "is_resuming" state for
  21 // couple of seconds. This is to give DiskManager time to process device
  22 // removed/added events (events for the devices that were present before suspend
  23 // should not trigger any new notifications or file manager windows).
  24 class MountedDiskMonitor
  25     : public chromeos::PowerManagerClient::Observer,
  26       public chromeos::disks::DiskMountManager::Observer {
  27  public:
  28   MountedDiskMonitor();
  29   virtual ~MountedDiskMonitor();
  30
  31   // PowerManagerClient::Observer overrides:
  32   virtual void SuspendImminent() OVERRIDE;
  33   virtual void SystemResumed(const base::TimeDelta& sleep_duration) OVERRIDE;
  34
  35   // DiskMountManager::Observer overrides.
  36   virtual void OnDiskEvent(
  37       chromeos::disks::DiskMountManager::DiskEvent event,
  38       const chromeos::disks::DiskMountManager::Disk* disk) OVERRIDE;
  39   virtual void OnDeviceEvent(
  40       chromeos::disks::DiskMountManager::DeviceEvent event,
  41       const std::string& device_path) OVERRIDE;
  42   virtual void OnMountEvent(
  43       chromeos::disks::DiskMountManager::MountEvent event,
  44       chromeos::MountError error_code,
  45       const chromeos::disks::DiskMountManager::MountPointInfo& mount_info)
  46       OVERRIDE;
  47   virtual void OnFormatEvent(
  48       chromeos::disks::DiskMountManager::FormatEvent event,
  49       chromeos::FormatError error_code,
  50       const std::string& device_path) OVERRIDE;
  51
  52   // Checks if the disk is being remounted. The disk is remounting if it has
  53   // been unmounted during the resuming time span.
  54   bool DiskIsRemounting(
  55       const chromeos::disks::DiskMountManager::Disk& disk) const;
  56  private:
  57   // Maps source paths with corresponding uuids.
  58   typedef std::map<std::string, std::string> DiskMap;
  59
  60   // Set of uuids.
  61   typedef std::set<std::string> DiskSet;
  62
  63   void Reset();
  64
  65   bool is_resuming_;
  66   DiskMap mounted_disks_;
  67   DiskSet unmounted_while_resuming_;
  68   base::WeakPtrFactory<MountedDiskMonitor> weak_factory_;
  69
  70   DISALLOW_COPY_AND_ASSIGN(MountedDiskMonitor);
  71 };
  72
  73 }  // namespace file_manager
  74
  75 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_MOUNTED_DISK_MONITOR_H_