1 files changed, 61 insertions, 0 deletions
diff --git a/ui/base/x/device_list_cache_x.cc b/ui/base/x/device_list_cache_x.cc
new file mode 100644
index 0000000..9fcb9db
--- /dev/null
+++ b/ui/base/x/device_list_cache_x.cc
@@ -0,0 +1,61 @@
+// 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.
+
+#include "ui/base/x/device_list_cache_x.h"
+
+#include <algorithm>
+
+#include "base/memory/singleton.h"
+#include "ui/base/x/x11_util.h"
+
+namespace ui {
+
+DeviceListCacheX::DeviceListCacheX() {
+}
+
+DeviceListCacheX::~DeviceListCacheX() {
+  std::map<Display*, XDeviceList>::iterator xp;
+  for (xp = x_dev_list_map_.begin(); xp != x_dev_list_map_.end(); xp++)
+    XFreeDeviceList(xp->second.devices);
+  std::map<Display*, XIDeviceList>::iterator xip;
+  for (xip = xi_dev_list_map_.begin(); xip != xi_dev_list_map_.end(); xip++)
+    XIFreeDeviceInfo(xip->second.devices);
+}
+
+DeviceListCacheX* DeviceListCacheX::GetInstance() {
+  return Singleton<DeviceListCacheX>::get();
+}
+
+void DeviceListCacheX::UpdateDeviceList(Display* display) {
+  XDeviceList& new_x_dev_list = x_dev_list_map_[display];
+  if (new_x_dev_list.devices)
+    XFreeDeviceList(new_x_dev_list.devices);
+  new_x_dev_list.devices = XListInputDevices(display, &new_x_dev_list.count);
+
+  XIDeviceList& new_xi_dev_list = xi_dev_list_map_[display];
+  if (new_xi_dev_list.devices)
+    XIFreeDeviceInfo(new_xi_dev_list.devices);
+  new_xi_dev_list.devices = XIQueryDevice(display, XIAllDevices,
+                                         &new_xi_dev_list.count);
+}
+
+const XDeviceList& DeviceListCacheX::GetXDeviceList(Display* display) {
+  XDeviceList& x_dev_list = x_dev_list_map_[display];
+  // Note that the function can be called before any update has taken place.
+  if (!x_dev_list.devices && !x_dev_list.count)
+    x_dev_list.devices = XListInputDevices(display, &x_dev_list.count);
+  return x_dev_list;
+}
+
+const XIDeviceList& DeviceListCacheX::GetXI2DeviceList(Display* display) {
+  XIDeviceList& xi_dev_list = xi_dev_list_map_[display];
+  if (!xi_dev_list.devices && !xi_dev_list.count) {
+    xi_dev_list.devices = XIQueryDevice(display, XIAllDevices,
+                                       &xi_dev_list.count);
+  }
+  return xi_dev_list;
+}
+
+}  // namespace ui
+