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#pragma once
#include <AK/Types.h>
#include <AK/DoublyLinkedList.h>
#include <AK/CircularQueue.h>
#include <VirtualFileSystem/CharacterDevice.h>
#include "IRQHandler.h"
class KeyboardClient;
class Keyboard final : public IRQHandler, public CharacterDevice {
AK_MAKE_ETERNAL
public:
enum Modifier {
Mod_Alt = 0x01,
Mod_Ctrl = 0x02,
Mod_Shift = 0x04,
};
struct Key {
byte character { 0 };
byte modifiers { 0 };
bool alt() { return modifiers & Mod_Alt; }
bool ctrl() { return modifiers & Mod_Ctrl; }
bool shift() { return modifiers & Mod_Shift; }
};
static Keyboard& the() PURE;
virtual ~Keyboard() override;
Keyboard();
void set_client(KeyboardClient* client) { m_client = client; }
private:
// ^IRQHandler
virtual void handle_irq() override;
// ^CharacterDevice
virtual ssize_t read(byte* buffer, size_t) override;
virtual ssize_t write(const byte* buffer, size_t) override;
virtual bool has_data_available_for_reading() const override;
void emit(byte);
KeyboardClient* m_client { nullptr };
CircularQueue<Key, 16> m_queue;
byte m_modifiers { 0 };
};
class KeyboardClient {
public:
virtual ~KeyboardClient();
virtual void on_key_pressed(Keyboard::Key) = 0;
};
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