ozone: evdev: Handle mouse events

ui/events/ozone/evdev/event_converter_evdev_impl.h

+// Copyright 2014 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_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_IMPL_H_
+#define UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_IMPL_H_
+
+#include "base/files/file_path.h"
+#include "base/message_loop/message_pump_libevent.h"
+#include "ui/events/event.h"
+#include "ui/events/ozone/evdev/cursor_delegate_evdev.h"
+#include "ui/events/ozone/evdev/event_converter_evdev.h"
+#include "ui/events/ozone/evdev/event_modifiers_evdev.h"
+#include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
+#include "ui/events/ozone/evdev/keyboard_evdev.h"
+
+struct input_event;
+
+namespace ui {
+
+class EVENTS_OZONE_EVDEV_EXPORT EventConverterEvdevImpl
+    : public EventConverterEvdev {
+ public:
+  EventConverterEvdevImpl(int fd,
+                          base::FilePath path,
+                          int id,
+                          EventModifiersEvdev* modifiers,
+                          CursorDelegateEvdev* cursor,
+                          KeyboardEvdev* keyboard,
+                          const EventDispatchCallback& callback);
+  virtual ~EventConverterEvdevImpl();
+
+  // EventConverterEvdev:
+  void OnFileCanReadWithoutBlocking(int fd) override;
+
+ private:
+  void ProcessEvents(const struct input_event* inputs, int count);
+
+  void ConvertKeyEvent(const input_event& input);
+
+  void ConvertMouseMoveEvent(const input_event& input);
+
+  void DispatchMouseButton(const input_event& input);
+
+  // Flush events delimited by EV_SYN. This is useful for handling
+  // non-axis-aligned movement properly.
+  void FlushEvents();
+
+  // Save x-axis events of relative devices to be flushed at EV_SYN time.
+  int x_offset_;
+
+  // Save y-axis events of relative devices to be flushed at EV_SYN time.
+  int y_offset_;
+
+  // Controller for watching the input fd.
+  base::MessagePumpLibevent::FileDescriptorWatcher controller_;
+
+  // Shared cursor state.
+  CursorDelegateEvdev* cursor_;
+
+  // Shared keyboard state.
+  KeyboardEvdev* keyboard_;
+
+  // Modifier key state (shift, ctrl, etc).
+  EventModifiersEvdev* modifiers_;
+
+  // Callback for dispatching events.
+  EventDispatchCallback callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(EventConverterEvdevImpl);
+};
+
+}  // namespace ui
+
+#endif  // UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_IMPL_H_
+