chrome/browser/storage_monitor/image_capture_device.h

   1 // Copyright (c) 2012 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_STORAGE_MONITOR_IMAGE_CAPTURE_DEVICE_H_
   6 #define CHROME_BROWSER_STORAGE_MONITOR_IMAGE_CAPTURE_DEVICE_H_
   7
   8 #import <Foundation/Foundation.h>
   9 #import <ImageCaptureCore/ImageCaptureCore.h>
  10
  11 #include "base/files/file_path.h"
  12 #include "base/mac/cocoa_protocols.h"
  13 #include "base/mac/foundation_util.h"
  14 #include "base/mac/scoped_nsobject.h"
  15 #include "base/memory/ref_counted.h"
  16 #include "base/memory/weak_ptr.h"
  17 #include "base/platform_file.h"
  18 #include "base/strings/string_util.h"
  19 #include "base/strings/sys_string_conversions.h"
  20 #include "base/synchronization/lock.h"
  21
  22 // Clients use this listener interface to get notifications about
  23 // events happening as a particular ImageCapture device is interacted with.
  24 // Clients drive the interaction through the ImageCaptureDeviceManager
  25 // and the ImageCaptureDevice classes, and get notifications of
  26 // events through this interface.
  27 class ImageCaptureDeviceListener {
  28  public:
  29   virtual ~ImageCaptureDeviceListener() {}
  30
  31   // Get a notification that a particular item has been found on the device.
  32   // These calls will come automatically after a new device is initialized.
  33   // Names are in relative path form, so subdirectories and files in them will
  34   // be passed as "dir/subdir/filename". These same relative filenames should
  35   // be used as keys to download files.
  36   virtual void ItemAdded(const std::string& name,
  37                          const base::PlatformFileInfo& info) = 0;
  38
  39   // Called when there are no more items to retrieve.
  40   virtual void NoMoreItems() = 0;
  41
  42   // Called upon completion of a file download request.
  43   // Note: in NOT_FOUND error case, may be called inline with the download
  44   // request.
  45   virtual void DownloadedFile(const std::string& name,
  46                               base::PlatformFileError error) = 0;
  47
  48   // Called to let the client know the device is removed. The client should
  49   // set the ImageCaptureDevice listener to null upon receiving this call.
  50   virtual void DeviceRemoved() = 0;
  51 };
  52
  53 // Interface to a camera device found by ImageCaptureCore. This class manages a
  54 // session to the camera and provides the backing interactions to present the
  55 // media files on it to the filesystem delegate. FilePaths will be artificial,
  56 // like "/$device_id/" + name.
  57 // Note that all interactions with this class must happen on the UI thread.
  58 @interface ImageCaptureDevice
  59     : NSObject<ICCameraDeviceDelegate, ICCameraDeviceDownloadDelegate> {
  60  @private
  61   base::scoped_nsobject<ICCameraDevice> camera_;
  62   base::WeakPtr<ImageCaptureDeviceListener> listener_;
  63   bool closing_;
  64 }
  65
  66 - (id)initWithCameraDevice:(ICCameraDevice*)cameraDevice;
  67 - (void)setListener:(base::WeakPtr<ImageCaptureDeviceListener>)listener;
  68 - (void)open;
  69 - (void)close;
  70
  71 - (void)eject;
  72
  73 // Download the given file |name| to the provided |local_path|. Completion
  74 // notice will be sent to the listener's DownloadedFile method. The name
  75 // should be of the same form as those sent to the listener's ItemAdded method.
  76 - (void)downloadFile:(const std::string&)name
  77            localPath:(const base::FilePath&)localPath;
  78
  79 @end
  80
  81 #endif  // CHROME_BROWSER_STORAGE_MONITOR_IMAGE_CAPTURE_DEVICE_H_