Upstream version 10.38.222.0
[platform/framework/web/crosswalk.git] / src / chrome / browser / chromeos / 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_FILE_MANAGER_MOUNTED_DISK_MONITOR_H_
6 #define CHROME_BROWSER_CHROMEOS_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 : public chromeos::PowerManagerClient::Observer {
25  public:
26   explicit MountedDiskMonitor(
27       chromeos::PowerManagerClient* power_manager_client);
28   virtual ~MountedDiskMonitor();
29
30   // PowerManagerClient::Observer overrides:
31   virtual void SuspendImminent() OVERRIDE;
32   virtual void SuspendDone(const base::TimeDelta& sleep_duration) OVERRIDE;
33
34   // Receives forwarded notifications originates from DiskMountManager.
35   void OnDiskEvent(
36       chromeos::disks::DiskMountManager::DiskEvent event,
37       const chromeos::disks::DiskMountManager::Disk* disk);
38   void OnDeviceEvent(
39       chromeos::disks::DiskMountManager::DeviceEvent event,
40       const std::string& device_path);
41   void OnMountEvent(
42       chromeos::disks::DiskMountManager::MountEvent event,
43       chromeos::MountError error_code,
44       const chromeos::disks::DiskMountManager::MountPointInfo& mount_info,
45       const chromeos::disks::DiskMountManager::Disk* disk);
46
47   // Checks if the disk is being remounted. The disk is remounting if it has
48   // been unmounted during the resuming time span.
49   bool DiskIsRemounting(
50       const chromeos::disks::DiskMountManager::Disk& disk) const;
51   bool DeviceIsHardUnpluggedButNotReported(
52       const std::string& device_path) const;
53   void MarkAsHardUnpluggedReported(const std::string& device_path);
54
55   // In order to avoid consuming time a lot for testing, this allows to set the
56   // resuming time span.
57   void set_resuming_time_span_for_testing(
58       const base::TimeDelta& resuming_time_span) {
59     resuming_time_span_ = resuming_time_span;
60   }
61
62  private:
63   enum HardUnpluggedState { HARD_UNPLUGGED, HARD_UNPLUGGED_AND_REPORTED };
64   // Maps source paths with corresponding uuids.
65   typedef std::map<std::string, std::string> DiskMap;
66
67   // Set of uuids.
68   typedef std::set<std::string> DiskSet;
69
70   void Reset();
71
72   chromeos::PowerManagerClient* power_manager_client_;
73
74   bool is_resuming_;
75   DiskMap mounted_disks_;
76   DiskSet unmounted_while_resuming_;
77   // Set of device path that is hard unplugged.
78   std::map<std::string, HardUnpluggedState> hard_unplugged_;
79   base::TimeDelta resuming_time_span_;
80   base::WeakPtrFactory<MountedDiskMonitor> weak_factory_;
81
82   DISALLOW_COPY_AND_ASSIGN(MountedDiskMonitor);
83 };
84
85 }  // namespace file_manager
86
87 #endif  // CHROME_BROWSER_CHROMEOS_FILE_MANAGER_MOUNTED_DISK_MONITOR_H_