blob: cd4124560ba0b16379b559a25c470f3a94012cc2 (
plain)
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
105
106
107
108
109
110
111
112
113
|
// 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.
#ifndef CONTENT_BROWSER_MEDIA_DEVICE_NOTIFICATIONS_LINUX_H_
#define CONTENT_BROWSER_MEDIA_DEVICE_NOTIFICATIONS_LINUX_H_
#pragma once
#include <map>
#include <set>
#include <string>
#include <utility>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/file_path.h"
#include "base/files/file_path_watcher.h"
#include "base/memory/ref_counted.h"
#include "base/system_monitor/system_monitor.h"
#include "content/common/content_export.h"
namespace content {
class CONTENT_EXPORT MediaDeviceNotificationsLinux
: public base::RefCountedThreadSafe<MediaDeviceNotificationsLinux> {
public:
explicit MediaDeviceNotificationsLinux(const FilePath& path);
// Must be called for MediaDeviceNotificationsLinux to work.
void Init();
void OnFilePathChanged(const FilePath& path);
private:
friend class base::RefCountedThreadSafe<MediaDeviceNotificationsLinux>;
typedef std::string MountDevice;
typedef std::string MountPoint;
typedef std::pair<MountDevice,
base::SystemMonitor::DeviceIdType> MountDeviceAndId;
typedef std::map<MountPoint, MountDeviceAndId> MountMap;
// A simple pass-through class. MediaDeviceNotificationsLinux cannot directly
// inherit from FilePathWatcher::Delegate due to multiple inheritance.
class WatcherDelegate : public base::files::FilePathWatcher::Delegate {
public:
explicit WatcherDelegate(MediaDeviceNotificationsLinux* notifier);
// base::files::FilePathWatcher::Delegate implementation.
virtual void OnFilePathChanged(const FilePath& path) OVERRIDE;
private:
friend class base::RefCountedThreadSafe<WatcherDelegate>;
virtual ~WatcherDelegate();
MediaDeviceNotificationsLinux* notifier_;
DISALLOW_COPY_AND_ASSIGN(WatcherDelegate);
};
virtual ~MediaDeviceNotificationsLinux();
void InitOnFileThread();
// Parse the mtab file and find all changes.
void UpdateMtab();
// Read the mtab file entries into |mtab|.
void ReadMtab(MountMap* mtab);
// For a new device mounted at |mount_point|, see if it is a media device by
// checking for the existence of a DCIM directory.
// If it is a media device, return true, otherwise return false.
// Mac OS X behaves similarly, but this is not the only heuristic it uses.
// TODO(vandebo) Try to figure out how Mac OS X decides this.
bool IsMediaDevice(const MountPoint& mount_point);
// Add a media device with a given device and mount device. Assign it a device
// id as well.
void AddNewDevice(const MountDevice& mount_device,
const MountPoint& mount_point,
base::SystemMonitor::DeviceIdType* device_id);
// Remove a media device with a given device id.
void RemoveOldDevice(const base::SystemMonitor::DeviceIdType& device_id);
// Whether Init() has been called or not.
bool initialized_;
// Mtab file that lists the mount points.
const FilePath mtab_path_;
// Watcher for |mtab_path_|.
base::files::FilePathWatcher file_watcher_;
// Delegate to receive watcher notifications.
scoped_refptr<WatcherDelegate> watcher_delegate_;
// Mapping of relevent mount points and their corresponding mount devices.
// Keep in mind on Linux, a device can be mounted at multiple mount points,
// and multiple devices can be mounted at a mount point.
MountMap mtab_;
// The lowest available device id number.
base::SystemMonitor::DeviceIdType current_device_id_;
// Set of known file systems that we care about.
std::set<std::string> known_file_systems_;
DISALLOW_COPY_AND_ASSIGN(MediaDeviceNotificationsLinux);
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_DEVICE_NOTIFICATIONS_LINUX_H_
|
