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// 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_LIBGESTURES_GLUE_EVENT_READER_LIBEVDEV_CROS_H_
#define UI_EVENTS_OZONE_EVDEV_LIBGESTURES_GLUE_EVENT_READER_LIBEVDEV_CROS_H_
#include <libevdev/libevdev.h>
#include <memory>
#include "base/files/file_path.h"
#include "base/files/scoped_file.h"
#include "base/macros.h"
#include "ui/events/ozone/evdev/event_converter_evdev.h"
#include "ui/events/ozone/evdev/event_device_info.h"
namespace ui {
// Basic wrapper for libevdev-cros.
//
// This drives libevdev-cros from a file descriptor and calls delegate
// with the updated event state from libevdev-cros.
//
// The library doesn't support all devices currently. In particular there
// is no support for keyboard events.
class EventReaderLibevdevCros : public EventConverterEvdev {
public:
class Delegate {
public:
virtual ~Delegate();
// Notifier for open. This is called with the initial event state.
virtual void OnLibEvdevCrosOpen(Evdev* evdev, EventStateRec* evstate) = 0;
// Notifier for event. This is called with the updated event state.
virtual void OnLibEvdevCrosEvent(Evdev* evdev,
EventStateRec* state,
const timeval& time) = 0;
// Notifier for stop. This is called with the final event state.
virtual void OnLibEvdevCrosStopped(Evdev* evdev, EventStateRec* state) = 0;
};
EventReaderLibevdevCros(base::ScopedFD fd,
const base::FilePath& path,
int id,
const EventDeviceInfo& devinfo,
std::unique_ptr<Delegate> delegate);
~EventReaderLibevdevCros() override;
// EventConverterEvdev:
void OnFileCanReadWithoutBlocking(int fd) override;
bool HasKeyboard() const override;
bool HasMouse() const override;
bool HasTouchpad() const override;
bool HasCapsLockLed() const override;
void OnDisabled() override;
private:
static void OnSynReport(void* data,
EventStateRec* evstate,
struct timeval* tv);
static void OnLogMessage(void*, int level, const char*, ...);
// Input modalities for this device.
bool has_keyboard_;
bool has_mouse_;
bool has_touchpad_;
// LEDs for this device.
bool has_caps_lock_led_;
// Libevdev state.
Evdev evdev_;
// Event state.
EventStateRec evstate_;
// Path to input device.
base::FilePath path_;
// Delegate for event processing.
std::unique_ptr<Delegate> delegate_;
DISALLOW_COPY_AND_ASSIGN(EventReaderLibevdevCros);
};
} // namspace ui
#endif // UI_EVENTS_OZONE_EVDEV_LIBGESTURES_GLUE_EVENT_READER_LIBEVDEV_CROS_H_