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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "KeyCode.h"
#include <AK/CircularQueue.h>
#include <AK/DoublyLinkedList.h>
#include <AK/Types.h>
#include <Kernel/Devices/CharacterDevice.h>
#include <Kernel/Interrupts/IRQHandler.h>
namespace Kernel {
class KeyboardClient;
class KeyboardDevice final : public IRQHandler
, public CharacterDevice {
AK_MAKE_ETERNAL
public:
using Event = KeyEvent;
static KeyboardDevice& the();
virtual ~KeyboardDevice() override;
KeyboardDevice();
void set_client(KeyboardClient* client) { m_client = client; }
void set_maps(const char* n_map, const char* n_shift_map, const char* n_alt_map, const char* n_altgr_map);
// ^CharacterDevice
virtual ssize_t read(FileDescription&, u8* buffer, ssize_t) override;
virtual bool can_read(const FileDescription&) const override;
virtual ssize_t write(FileDescription&, const u8* buffer, ssize_t) override;
virtual bool can_write(const FileDescription&) const override { return true; }
virtual const char* purpose() const override { return class_name(); }
private:
// ^IRQHandler
virtual void handle_irq(const RegisterState&) override;
// ^CharacterDevice
virtual const char* class_name() const override { return "KeyboardDevice"; }
void key_state_changed(u8 raw, bool pressed);
void update_modifier(u8 modifier, bool state)
{
if (state)
m_modifiers |= modifier;
else
m_modifiers &= ~modifier;
}
KeyboardClient* m_client { nullptr };
CircularQueue<Event, 16> m_queue;
u8 m_modifiers { 0 };
bool m_caps_lock_on { false };
bool m_num_lock_on { false };
bool m_has_e0_prefix { false };
};
class KeyboardClient {
public:
virtual ~KeyboardClient();
virtual void on_key_pressed(KeyboardDevice::Event) = 0;
};
}
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