Add ICU message format support
[chromium-blink-merge.git] / ui / events / devices / x11 / device_list_cache_x11.h
blob068b6464cdb8a7573fae7a3110d649beb9a4c3eb
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>
11 #include <map>
13 #include "base/basictypes.h"
14 #include "base/memory/scoped_ptr.h"
15 #include "ui/events/devices/events_devices_export.h"
16 #include "ui/gfx/x/x11_types.h"
18 template <typename T> struct DefaultSingletonTraits;
20 typedef struct _XDisplay Display;
22 template <typename T, void (*D)(T*)>
23 struct DeviceList {
24 DeviceList() : count(0) {}
25 T& operator[](int x) { return devices[x]; }
26 const T& operator[](int x) const { return devices[x]; }
27 scoped_ptr<T[], gfx::XObjectDeleter<T, void, D>> devices;
28 int count;
31 typedef struct DeviceList<XDeviceInfo, XFreeDeviceList> XDeviceList;
32 typedef struct DeviceList<XIDeviceInfo, XIFreeDeviceInfo> XIDeviceList;
34 namespace ui {
36 // A class to cache the current XInput device list. This minimized the
37 // round-trip time to the X server whenever such a device list is needed. The
38 // update function will be called on each incoming XI_HierarchyChanged event.
39 class EVENTS_DEVICES_EXPORT DeviceListCacheX11 {
40 public:
41 static DeviceListCacheX11* GetInstance();
43 void UpdateDeviceList(Display* display);
45 // Returns the list of devices associated with |display|. Uses the old X11
46 // protocol to get the list of the devices.
47 const XDeviceList& GetXDeviceList(Display* display);
49 // Returns the list of devices associated with |display|. Uses the newer
50 // XINPUT2 protocol to get the list of devices. Before making this call, make
51 // sure that XInput2 support is available (e.g. by calling
52 // IsXInput2Available()).
53 const XIDeviceList& GetXI2DeviceList(Display* display);
55 private:
56 friend struct DefaultSingletonTraits<DeviceListCacheX11>;
58 DeviceListCacheX11();
59 ~DeviceListCacheX11();
61 XDeviceList x_dev_list_;
62 XIDeviceList xi_dev_list_;
64 DISALLOW_COPY_AND_ASSIGN(DeviceListCacheX11);
67 } // namespace ui
69 #endif // UI_EVENTS_DEVICES_X11_DEVICE_LIST_CACHE_X11_H_