chrome/browser/extensions/api/image_writer_private/removable_storage_provider.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 #ifndef CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_REMOVABLE_STORAGE_PROVIDER_H_
   5 #define CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_REMOVABLE_STORAGE_PROVIDER_H_
   6
   7 #include "base/callback.h"
   8 #include "chrome/common/extensions/api/image_writer_private.h"
   9 #include "chrome/common/ref_counted_util.h"
  10
  11 namespace extensions {
  12
  13 // TODO(haven): Clean up this class to remove refcounting.  http://crbug/370590
  14
  15 typedef RefCountedVector<linked_ptr
  16   <api::image_writer_private::RemovableStorageDevice> > StorageDeviceList;
  17
  18 // Abstraction for platform specific implementations of listing removable
  19 // storage devices
  20 class RemovableStorageProvider {
  21  public:
  22   typedef base::Callback<void(scoped_refptr<StorageDeviceList>, bool)>
  23     DeviceListReadyCallback;
  24
  25   // Gets the list of all available devices and returns it via callback.
  26   static void GetAllDevices(DeviceListReadyCallback callback);
  27
  28   // Sets the list of devices that will be returned by GetAllDevices during
  29   // testing.  All calls to |GetAllDevices| will return this list until
  30   // |ClearDeviceListForTesting| is called.
  31   static void SetDeviceListForTesting(
  32       scoped_refptr<StorageDeviceList> device_list);
  33   // Clears the list of devices that is used during testing.
  34   static void ClearDeviceListForTesting();
  35
  36  private:
  37   // Fills the provided empty device list with the available devices.
  38   static bool PopulateDeviceList(scoped_refptr<StorageDeviceList> device_list);
  39 };
  40
  41 } // namespace extensions
  42
  43 #endif  // CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_REMOVABLE_STORAGE_PROVIDER_H_