[ozone/wayland] Implement basic keyboard handling support

ui/ozone/platform/wayland/wayland_keyboard.h

+// Copyright 2016 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.
+
+#ifndef UI_OZONE_PLATFORM_WAYLAND_WAYLAND_KEYBOARD_H_
+#define UI_OZONE_PLATFORM_WAYLAND_WAYLAND_KEYBOARD_H_
+
+#include "ui/events/ozone/evdev/event_dispatch_callback.h"
+#include "ui/ozone/platform/wayland/wayland_object.h"
+
+namespace ui {
+
+class WaylandKeyboard {
+ public:
+  WaylandKeyboard(wl_keyboard* keyboard, const EventDispatchCallback& callback);
+  virtual ~WaylandKeyboard();
+
+ private:
+  // wl_keyboard_listener
+  static void Keymap(void* data,
+                     wl_keyboard* obj,
+                     uint32_t format,
+                     int32_t fd,
+                     uint32_t size);
+  static void Enter(void* data,
+                    wl_keyboard* obj,
+                    uint32_t serial,
+                    wl_surface* surface,
+                    wl_array* keys);
+  static void Leave(void* data,
+                    wl_keyboard* obj,
+                    uint32_t serial,
+                    wl_surface* surface);
+  static void Key(void* data,
+                  wl_keyboard* obj,
+                  uint32_t serial,
+                  uint32_t time,
+                  uint32_t key,
+                  uint32_t state);
+  static void Modifiers(void* data,
+                        wl_keyboard* obj,
+                        uint32_t serial,
+                        uint32_t mods_depressed,
+                        uint32_t mods_latched,
+                        uint32_t mods_locked,
+                        uint32_t group);
+  static void RepeatInfo(void* data,
+                         wl_keyboard* obj,
+                         int32_t rate,
+                         int32_t delay);
+
+  wl::Object<wl_keyboard> obj_;
+  EventDispatchCallback callback_;
+  uint8_t modifiers_ = 0;
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_WAYLAND_WAYLAND_KEYBOARD_H_