blob: 45d82a6f87b425f7cfd18b2f9fc4d8c601ca4dbd (
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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
// Copyright 2014 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.
#include "chrome/browser/extensions/api/hid/hid_device_manager.h"
#include <limits>
#include <vector>
#include "base/lazy_instance.h"
#include "device/hid/hid_service.h"
using device::HidService;
using device::HidUsageAndPage;
namespace extensions {
HidDeviceManager::HidDeviceManager(content::BrowserContext* context)
: next_resource_id_(0) {}
HidDeviceManager::~HidDeviceManager() {}
// static
BrowserContextKeyedAPIFactory<HidDeviceManager>*
HidDeviceManager::GetFactoryInstance() {
static base::LazyInstance<BrowserContextKeyedAPIFactory<HidDeviceManager> >
factory = LAZY_INSTANCE_INITIALIZER;
return &factory.Get();
}
scoped_ptr<base::ListValue> HidDeviceManager::GetApiDevices(
uint16_t vendor_id,
uint16_t product_id) {
UpdateDevices();
HidService* hid_service = HidService::GetInstance();
DCHECK(hid_service);
base::ListValue* api_devices = new base::ListValue();
for (ResourceIdToDeviceIdMap::const_iterator device_iter =
device_ids_.begin();
device_iter != device_ids_.end();
++device_iter) {
int resource_id = device_iter->first;
device::HidDeviceId device_id = device_iter->second;
device::HidDeviceInfo device_info;
if (hid_service->GetDeviceInfo(device_id, &device_info)) {
if (device_info.vendor_id == vendor_id &&
device_info.product_id == product_id &&
IsDeviceAccessible(device_info)) {
api::hid::HidDeviceInfo api_device_info;
api_device_info.device_id = resource_id;
api_device_info.vendor_id = device_info.vendor_id;
api_device_info.product_id = device_info.product_id;
for (std::vector<device::HidUsageAndPage>::const_iterator usage_iter =
device_info.usages.begin();
usage_iter != device_info.usages.end();
++usage_iter) {
api::hid::HidUsageAndPage* usage_and_page =
new api::hid::HidUsageAndPage();
usage_and_page->usage_page = (*usage_iter).usage_page;
usage_and_page->usage = (*usage_iter).usage;
linked_ptr<api::hid::HidUsageAndPage> usage_and_page_ptr(
usage_and_page);
api_device_info.usages.push_back(usage_and_page_ptr);
}
api_devices->Append(api_device_info.ToValue().release());
}
}
}
return scoped_ptr<base::ListValue>(api_devices);
}
bool HidDeviceManager::GetDeviceInfo(int resource_id,
device::HidDeviceInfo* device_info) {
UpdateDevices();
HidService* hid_service = HidService::GetInstance();
DCHECK(hid_service);
ResourceIdToDeviceIdMap::const_iterator device_iter =
device_ids_.find(resource_id);
if (device_iter == device_ids_.end())
return false;
return hid_service->GetDeviceInfo(device_iter->second, device_info);
}
void HidDeviceManager::UpdateDevices() {
thread_checker_.CalledOnValidThread();
HidService* hid_service = HidService::GetInstance();
DCHECK(hid_service);
std::vector<device::HidDeviceInfo> devices;
hid_service->GetDevices(&devices);
// Build an updated bidi mapping between resource ID and underlying device ID.
DeviceIdToResourceIdMap new_resource_ids;
ResourceIdToDeviceIdMap new_device_ids;
for (std::vector<device::HidDeviceInfo>::const_iterator iter =
devices.begin();
iter != devices.end();
++iter) {
const device::HidDeviceInfo& device_info = *iter;
DeviceIdToResourceIdMap::iterator resource_iter =
resource_ids_.find(device_info.device_id);
int new_id;
if (resource_iter != resource_ids_.end()) {
new_id = resource_iter->second;
} else {
DCHECK_LT(next_resource_id_, std::numeric_limits<int>::max());
new_id = next_resource_id_++;
}
new_resource_ids[device_info.device_id] = new_id;
new_device_ids[new_id] = device_info.device_id;
}
device_ids_.swap(new_device_ids);
resource_ids_.swap(new_resource_ids);
}
// static
// TODO(rockot): Add some tests for this.
bool HidDeviceManager::IsDeviceAccessible(
const device::HidDeviceInfo& device_info) {
for (std::vector<device::HidUsageAndPage>::const_iterator iter =
device_info.usages.begin();
iter != device_info.usages.end(); ++iter) {
if (!IsUsageAccessible(*iter)) {
return false;
}
}
return true;
}
// static
bool HidDeviceManager::IsUsageAccessible(
const HidUsageAndPage& usage_and_page) {
if (usage_and_page.usage_page == HidUsageAndPage::kPageKeyboard)
return false;
if (usage_and_page.usage_page != HidUsageAndPage::kPageGenericDesktop)
return true;
uint16_t usage = usage_and_page.usage;
if (usage == HidUsageAndPage::kGenericDesktopPointer ||
usage == HidUsageAndPage::kGenericDesktopMouse ||
usage == HidUsageAndPage::kGenericDesktopKeyboard ||
usage == HidUsageAndPage::kGenericDesktopKeypad) {
return false;
}
if (usage >= HidUsageAndPage::kGenericDesktopSystemControl &&
usage <= HidUsageAndPage::kGenericDesktopSystemWarmRestart) {
return false;
}
if (usage >= HidUsageAndPage::kGenericDesktopSystemDock &&
usage <= HidUsageAndPage::kGenericDesktopSystemDisplaySwap) {
return false;
}
return true;
}
} // namespace extensions
|
