chrome/browser/chromeos/extensions/file_manager/device_event_router.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 #ifndef CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_DEVICE_EVENT_ROUTER_H_
   6 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_DEVICE_EVENT_ROUTER_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/threading/thread_checker.h"
  13 #include "chrome/browser/chromeos/file_manager/volume_manager_observer.h"
  14 #include "chrome/common/extensions/api/file_manager_private.h"
  15 #include "chromeos/dbus/power_manager_client.h"
  16
  17 namespace file_manager {
  18
  19 enum DeviceState {
  20   // Device is not being hard unplugged.
  21   DEVICE_STATE_USUAL,
  22   // Device is hard unplugged.
  23   DEVICE_HARD_UNPLUGGED,
  24   // Device is hard unplugged and reported to the JavaScript side.
  25   DEVICE_HARD_UNPLUGGED_AND_REPORTED
  26 };
  27
  28 // Event router for device events.
  29 class DeviceEventRouter : public VolumeManagerObserver,
  30                           public chromeos::PowerManagerClient::Observer {
  31  public:
  32   DeviceEventRouter();
  33
  34   // |overriding_time_delta| overrides time delta of delayed tasks for testing
  35   // |so that the tasks are executed by RunLoop::RunUntilIdle.
  36   explicit DeviceEventRouter(base::TimeDelta overriding_time_delta);
  37
  38   ~DeviceEventRouter() override;
  39
  40   // Turns the startup flag on, and then turns it off after few seconds.
  41   void Startup();
  42
  43   // VolumeManagerObserver overrides.
  44   void OnDiskAdded(const chromeos::disks::DiskMountManager::Disk& disk,
  45                    bool mounting) override;
  46   void OnDiskRemoved(
  47       const chromeos::disks::DiskMountManager::Disk& disk) override;
  48   void OnDeviceAdded(const std::string& device_path) override;
  49   void OnDeviceRemoved(const std::string& device_path) override;
  50   void OnVolumeMounted(chromeos::MountError error_code,
  51                        const Volume& volume) override;
  52   void OnVolumeUnmounted(chromeos::MountError error_code,
  53                          const Volume& volume) override;
  54   void OnFormatStarted(const std::string& device_path, bool success) override;
  55   void OnFormatCompleted(const std::string& device_path, bool success) override;
  56
  57   // PowerManagerClient::Observer overrides.
  58   void SuspendImminent() override;
  59   void SuspendDone(const base::TimeDelta& sleep_duration) override;
  60
  61   bool is_resuming() const { return is_resuming_; }
  62   bool is_starting_up() const { return is_starting_up_; }
  63
  64  protected:
  65   // Handles a device event containing |type| and |device_path|.
  66   virtual void OnDeviceEvent(
  67       extensions::api::file_manager_private::DeviceEventType type,
  68       const std::string& device_path) = 0;
  69   // Returns external storage is disabled or not.
  70   virtual bool IsExternalStorageDisabled() = 0;
  71
  72  private:
  73   void StartupDelayed();
  74   void OnDeviceAddedDelayed(const std::string& device_path);
  75   void SuspendDoneDelayed();
  76
  77   // Obtains device state of the device having |device_path|.
  78   DeviceState GetDeviceState(const std::string& device_path) const;
  79
  80   // Sets device state to the device having |device_path|.
  81   void SetDeviceState(const std::string& device_path, DeviceState state);
  82
  83   // Whther to use zero time delta for testing or not.
  84   const base::TimeDelta resume_time_delta_;
  85   const base::TimeDelta startup_time_delta_;
  86
  87   // Whether the profile is starting up or not.
  88   bool is_starting_up_;
  89
  90   // Whether the system is resuming or not.
  91   bool is_resuming_;
  92
  93   // Map of device path and device state.
  94   std::map<std::string, DeviceState> device_states_;
  95
  96   // Thread checker.
  97   base::ThreadChecker thread_checker_;
  98
  99   // Note: This should remain the last member so it'll be destroyed and
 100   // invalidate the weak pointers before any other members are destroyed.
 101   base::WeakPtrFactory<DeviceEventRouter> weak_factory_;
 102   DISALLOW_COPY_AND_ASSIGN(DeviceEventRouter);
 103 };
 104 }  // namespace file_manager
 105
 106 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_DEVICE_EVENT_ROUTER_H_