components/storage_monitor/storage_monitor_chromeos.h

   1 // Copyright 2014 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 // StorageMonitorCros listens for mount point changes and notifies listeners
   6 // about the addition and deletion of media devices. This class lives on the
   7 // UI thread.
   8
   9 #ifndef COMPONENTS_STORAGE_MONITOR_STORAGE_MONITOR_CHROMEOS_H_
  10 #define COMPONENTS_STORAGE_MONITOR_STORAGE_MONITOR_CHROMEOS_H_
  11
  12 #if !defined(OS_CHROMEOS)
  13 #error "Should only be used on ChromeOS."
  14 #endif
  15
  16 #include <map>
  17 #include <string>
  18
  19 #include "base/basictypes.h"
  20 #include "base/compiler_specific.h"
  21 #include "base/memory/scoped_ptr.h"
  22 #include "base/memory/weak_ptr.h"
  23 #include "chromeos/disks/disk_mount_manager.h"
  24 #include "components/storage_monitor/storage_monitor.h"
  25
  26 namespace storage_monitor {
  27
  28 class MediaTransferProtocolDeviceObserverLinux;
  29
  30 class StorageMonitorCros : public StorageMonitor,
  31                            public chromeos::disks::DiskMountManager::Observer {
  32  public:
  33   // Should only be called by browser start up code.
  34   // Use StorageMonitor::GetInstance() instead.
  35   StorageMonitorCros();
  36   ~StorageMonitorCros() override;
  37
  38   // Sets up disk listeners and issues notifications for any discovered
  39   // mount points. Sets up MTP manager and listeners.
  40   void Init() override;
  41
  42  protected:
  43   void SetMediaTransferProtocolManagerForTest(
  44       device::MediaTransferProtocolManager* test_manager);
  45
  46   // chromeos::disks::DiskMountManager::Observer implementation.
  47   void OnDiskEvent(
  48       chromeos::disks::DiskMountManager::DiskEvent event,
  49       const chromeos::disks::DiskMountManager::Disk* disk) override;
  50   void OnDeviceEvent(chromeos::disks::DiskMountManager::DeviceEvent event,
  51                      const std::string& device_path) override;
  52   void OnMountEvent(chromeos::disks::DiskMountManager::MountEvent event,
  53                     chromeos::MountError error_code,
  54                     const chromeos::disks::DiskMountManager::MountPointInfo&
  55                         mount_info) override;
  56   void OnFormatEvent(chromeos::disks::DiskMountManager::FormatEvent event,
  57                      chromeos::FormatError error_code,
  58                      const std::string& device_path) override;
  59
  60   // StorageMonitor implementation.
  61   bool GetStorageInfoForPath(const base::FilePath& path,
  62                              StorageInfo* device_info) const override;
  63   void EjectDevice(const std::string& device_id,
  64                    base::Callback<void(EjectStatus)> callback) override;
  65   device::MediaTransferProtocolManager* media_transfer_protocol_manager()
  66       override;
  67
  68  private:
  69   // Mapping of mount path to removable mass storage info.
  70   typedef std::map<std::string, StorageInfo> MountMap;
  71
  72   // Helper method that checks existing mount points to see if they are media
  73   // devices. Eventually calls AddMountedPath for all mount points.
  74   void CheckExistingMountPoints();
  75
  76   // Adds the mount point in |mount_info| to |mount_map_| and send a media
  77   // device attach notification. |has_dcim| is true if the attached device has
  78   // a DCIM folder.
  79   void AddMountedPath(
  80       const chromeos::disks::DiskMountManager::MountPointInfo& mount_info,
  81       bool has_dcim);
  82
  83   // Mapping of relevant mount points and their corresponding mount devices.
  84   MountMap mount_map_;
  85
  86   scoped_ptr<device::MediaTransferProtocolManager>
  87       media_transfer_protocol_manager_;
  88   scoped_ptr<MediaTransferProtocolDeviceObserverLinux>
  89       media_transfer_protocol_device_observer_;
  90
  91   base::WeakPtrFactory<StorageMonitorCros> weak_ptr_factory_;
  92
  93   DISALLOW_COPY_AND_ASSIGN(StorageMonitorCros);
  94 };
  95
  96 }  // namespace storage_monitor
  97
  98 #endif  // COMPONENTS_STORAGE_MONITOR_STORAGE_MONITOR_CHROMEOS_H_