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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 #include "ui/events/x/device_list_cache_x.h"
6 
7 #include <algorithm>
8 
9 #include "base/memory/singleton.h"
10 #include "base/message_loop/message_loop.h"
11 #include "ui/events/x/device_data_manager_x11.h"
12 
13 namespace {
14 
IsXI2Available()15 bool IsXI2Available() {
16 #if defined(USE_AURA)
17   return ui::DeviceDataManagerX11::GetInstance()->IsXInput2Available();
18 #else
19   return false;
20 #endif
21 }
22 
23 }
24 
25 namespace ui {
26 
DeviceListCacheX()27 DeviceListCacheX::DeviceListCacheX() {
28 }
29 
~DeviceListCacheX()30 DeviceListCacheX::~DeviceListCacheX() {
31   std::map<Display*, XDeviceList>::iterator xp;
32   for (xp = x_dev_list_map_.begin(); xp != x_dev_list_map_.end(); xp++) {
33     if (xp->second.devices)
34       XFreeDeviceList(xp->second.devices);
35   }
36   std::map<Display*, XIDeviceList>::iterator xip;
37   for (xip = xi_dev_list_map_.begin(); xip != xi_dev_list_map_.end(); xip++) {
38     if (xip->second.devices)
39       XIFreeDeviceInfo(xip->second.devices);
40   }
41 }
42 
GetInstance()43 DeviceListCacheX* DeviceListCacheX::GetInstance() {
44   return Singleton<DeviceListCacheX>::get();
45 }
46 
UpdateDeviceList(Display * display)47 void DeviceListCacheX::UpdateDeviceList(Display* display) {
48   XDeviceList& new_x_dev_list = x_dev_list_map_[display];
49   if (new_x_dev_list.devices)
50     XFreeDeviceList(new_x_dev_list.devices);
51   new_x_dev_list.devices = XListInputDevices(display, &new_x_dev_list.count);
52 
53   XIDeviceList& new_xi_dev_list = xi_dev_list_map_[display];
54   if (new_xi_dev_list.devices)
55     XIFreeDeviceInfo(new_xi_dev_list.devices);
56   new_xi_dev_list.devices = IsXI2Available() ?
57       XIQueryDevice(display, XIAllDevices, &new_xi_dev_list.count) : NULL;
58 }
59 
GetXDeviceList(Display * display)60 const XDeviceList& DeviceListCacheX::GetXDeviceList(Display* display) {
61   XDeviceList& x_dev_list = x_dev_list_map_[display];
62   // Note that the function can be called before any update has taken place.
63   if (!x_dev_list.devices && !x_dev_list.count)
64     x_dev_list.devices = XListInputDevices(display, &x_dev_list.count);
65   return x_dev_list;
66 }
67 
GetXI2DeviceList(Display * display)68 const XIDeviceList& DeviceListCacheX::GetXI2DeviceList(Display* display) {
69   XIDeviceList& xi_dev_list = xi_dev_list_map_[display];
70   if (!xi_dev_list.devices && !xi_dev_list.count) {
71     xi_dev_list.devices = XIQueryDevice(display, XIAllDevices,
72                                        &xi_dev_list.count);
73   }
74   return xi_dev_list;
75 }
76 
77 }  // namespace ui
78 
79