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// 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/events/devices/x11/device_list_cache_x11.h"
#include <algorithm>
#include "base/memory/singleton.h"
#include "base/message_loop/message_loop.h"
#include "ui/events/devices/x11/device_data_manager_x11.h"
namespace {
bool IsXI2Available() {
#if defined(USE_AURA)
return ui::DeviceDataManagerX11::GetInstance()->IsXInput2Available();
#else
return false;
#endif
}
}
namespace ui {
DeviceListCacheX11::DeviceListCacheX11() {
}
DeviceListCacheX11::~DeviceListCacheX11() {
}
DeviceListCacheX11* DeviceListCacheX11::GetInstance() {
return base::Singleton<DeviceListCacheX11>::get();
}
void DeviceListCacheX11::UpdateDeviceList(Display* display) {
XDeviceList& new_x_dev_list = x_dev_list_;
new_x_dev_list.devices.reset(
XListInputDevices(display, &new_x_dev_list.count));
XIDeviceList& new_xi_dev_list = xi_dev_list_;
new_xi_dev_list.devices.reset(
IsXI2Available()
? XIQueryDevice(display, XIAllDevices, &new_xi_dev_list.count)
: nullptr);
}
const XDeviceList& DeviceListCacheX11::GetXDeviceList(Display* display) {
XDeviceList& x_dev_list = x_dev_list_;
// 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.reset(XListInputDevices(display, &x_dev_list.count));
return x_dev_list;
}
const XIDeviceList& DeviceListCacheX11::GetXI2DeviceList(Display* display) {
XIDeviceList& xi_dev_list = xi_dev_list_;
if (!xi_dev_list.devices && !xi_dev_list.count) {
xi_dev_list.devices.reset(
XIQueryDevice(display, XIAllDevices, &xi_dev_list.count));
}
return xi_dev_list;
}
} // namespace ui
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