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