1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// chrome::MediaStorageUtil provides information about storage devices attached
// to the computer.
#ifndef CHROME_BROWSER_SYSTEM_MONITOR_MEDIA_STORAGE_UTIL_H_
#define CHROME_BROWSER_SYSTEM_MONITOR_MEDIA_STORAGE_UTIL_H_
#include <set>
#include <string>
#include "base/basictypes.h"
#include "base/callback_forward.h"
#include "base/file_path.h"
namespace chrome {
class MediaStorageUtil {
public:
enum Type {
// A removable mass storage device with a DCIM directory.
REMOVABLE_MASS_STORAGE_WITH_DCIM,
// A removable mass storage device without a DCIM directory.
REMOVABLE_MASS_STORAGE_NO_DCIM,
// A fixed mass storage device.
FIXED_MASS_STORAGE,
// A MTP or PTP device.
MTP_OR_PTP,
};
typedef std::set<std::string /*device id*/> DeviceIdSet;
typedef base::Callback<void(bool)> BoolCallback;
// Returns a device id given properties of the device. A prefix dependent on
// |type| is added so |unique_id| need only be unique within the given type.
// Returns an empty string if an invalid type is passed in.
static std::string MakeDeviceId(Type type, const std::string& unique_id);
// Extracts the device |type| and |unique_id| from |device_id|. Returns false
// if the device_id isn't properly formatted.
static bool CrackDeviceId(const std::string& device_id,
Type* type, std::string* unique_id);
// Looks inside |device_id| to determine if it is a media device
// (type is REMOVABLE_MASS_STORAGE_WITH_DCIM or MTP_OR_PTP).
static bool IsMediaDevice(const std::string& device_id);
// Looks inside |device_id| to determine if it is a media device
// (type isn't FIXED_MASS_STORAGE).
static bool IsRemovableDevice(const std::string& device_id);
// Looks inside |device_id| to determine if it is a mass storage device
// (type isn't MTP_OR_PTP).
static bool IsMassStorageDevice(const std::string& device_id);
// Determines if the device is attached to the computer.
static void IsDeviceAttached(const std::string& device_id,
const BoolCallback& callback);
// Removes disconnected devices from |devices| and then calls |done|.
static void FilterAttachedDevices(DeviceIdSet* devices,
const base::Closure& done);
// Given |path|, fill in |device_id|, |device_name|, and |relative_path|
// (from the root of the device) if they are not NULL.
static bool GetDeviceInfoFromPath(const FilePath& path,
std::string* device_id,
string16* device_name,
FilePath* relative_path);
// Get a FilePath for the given |device_id|. If the device isn't a mass
// storage type, the FilePath will be empty. This does not check that
// the device is connected.
static FilePath FindDevicePathById(const std::string& device_id);
// Record device information histogram for the given |device_uuid| and
// |device_name|. |mass_storage| indicates whether the current device is a
// mass storage device, as defined by IsMassStorageDevice().
static void RecordDeviceInfoHistogram(bool mass_storage,
const std::string& device_uuid,
const string16& device_name);
protected:
typedef bool (*GetDeviceInfoFromPathFunction)(const FilePath& path,
std::string* device_id,
string16* device_name,
FilePath* relative_path);
// Set the implementation of GetDeviceInfoFromPath for testing.
static void SetGetDeviceInfoFromPathFunctionForTesting(
GetDeviceInfoFromPathFunction function);
private:
// All methods are static, this class should not be instantiated.
MediaStorageUtil();
DISALLOW_COPY_AND_ASSIGN(MediaStorageUtil);
};
} // namespace chrome
#endif // CHROME_BROWSER_SYSTEM_MONITOR_MEDIA_STORAGE_UTIL_H_
|
