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
13namespace {
14
15bool IsXI2Available() {
16#if defined(USE_AURA)
17  return ui::DeviceDataManagerX11::GetInstance()->IsXInput2Available();
18#else
19  return false;
20#endif
21}
22
23}
24
25namespace ui {
26
27DeviceListCacheX::DeviceListCacheX() {
28}
29
30DeviceListCacheX::~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
43DeviceListCacheX* DeviceListCacheX::GetInstance() {
44  return Singleton<DeviceListCacheX>::get();
45}
46
47void 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
60const 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
68const 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