serenity/Kernel/Keyboard.h

56 lines
1.4 KiB
C
Raw Normal View History

#pragma once
#include <AK/Types.h>
#include <AK/DoublyLinkedList.h>
#include <AK/CircularQueue.h>
2019-01-23 05:13:17 +01:00
#include <Kernel/CharacterDevice.h>
#include "IRQHandler.h"
#include "KeyCode.h"
class KeyboardClient;
class Keyboard final : public IRQHandler, public CharacterDevice {
AK_MAKE_ETERNAL
public:
using Event = KeyEvent;
[[gnu::pure]] static Keyboard& the();
virtual ~Keyboard() override;
Keyboard();
2018-12-03 00:39:25 +01:00
void set_client(KeyboardClient* client) { m_client = client; }
// ^CharacterDevice
virtual ssize_t read(Process&, byte* buffer, size_t) override;
virtual bool can_read(Process&) const override;
virtual ssize_t write(Process&, const byte* buffer, size_t) override;
virtual bool can_write(Process&) const override { return true; }
private:
// ^IRQHandler
virtual void handle_irq() override;
// ^CharacterDevice
virtual const char* class_name() const override { return "Keyboard"; }
void key_state_changed(byte raw, bool pressed);
void update_modifier(byte modifier, bool state)
{
if (state)
m_modifiers |= modifier;
else
m_modifiers &= ~modifier;
}
KeyboardClient* m_client { nullptr };
CircularQueue<Event, 16> m_queue;
byte m_modifiers { 0 };
};
class KeyboardClient {
public:
virtual ~KeyboardClient();
virtual void on_key_pressed(Keyboard::Event) = 0;
};