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.
5 #ifndef UI_EVENTS_DEVICES_X11_DEVICE_LIST_CACHE_X11_H_
6 #define UI_EVENTS_DEVICES_X11_DEVICE_LIST_CACHE_X11_H_
8 #include <X11/extensions/XInput.h>
9 #include <X11/extensions/XInput2.h>
13 #include "base/basictypes.h"
14 #include "ui/events/devices/events_devices_export.h"
16 template <typename T> struct DefaultSingletonTraits;
18 typedef struct _XDisplay Display;
22 DeviceList() : devices(NULL), count(0) {
24 T& operator[] (int x) {
27 const T& operator[](int x) const { return devices[x]; }
32 typedef struct DeviceList<XDeviceInfo> XDeviceList;
33 typedef struct DeviceList<XIDeviceInfo> XIDeviceList;
37 // A class to cache the current XInput device list. This minimized the
38 // round-trip time to the X server whenever such a device list is needed. The
39 // update function will be called on each incoming XI_HierarchyChanged event.
40 class EVENTS_DEVICES_EXPORT DeviceListCacheX11 {
42 static DeviceListCacheX11* GetInstance();
44 void UpdateDeviceList(Display* display);
46 // Returns the list of devices associated with |display|. Uses the old X11
47 // protocol to get the list of the devices.
48 const XDeviceList& GetXDeviceList(Display* display);
50 // Returns the list of devices associated with |display|. Uses the newer
51 // XINPUT2 protocol to get the list of devices. Before making this call, make
52 // sure that XInput2 support is available (e.g. by calling
53 // IsXInput2Available()).
54 const XIDeviceList& GetXI2DeviceList(Display* display);
57 friend struct DefaultSingletonTraits<DeviceListCacheX11>;
60 ~DeviceListCacheX11();
62 std::map<Display*, XDeviceList> x_dev_list_map_;
63 std::map<Display*, XIDeviceList> xi_dev_list_map_;
65 DISALLOW_COPY_AND_ASSIGN(DeviceListCacheX11);
70 #endif // UI_EVENTS_DEVICES_X11_DEVICE_LIST_CACHE_X11_H_