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https://github.com/fergalmoran/ladybird.git
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8293b22361
Our current implementation does not work in the special case in which both shift keys are pressed, and then only one of the keys is released, as this would result in writing lower case letters, instead of the expected upper case letters. This commit fixes that by keeping track of the amount of shift keys that are pressed (instead of if any are at all), and only switching to the unshifted keymap once all of them are released.
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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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/API/KeyCode.h>
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#include <Kernel/Devices/CharacterDevice.h>
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#include <Kernel/Devices/HID/HIDDevice.h>
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#include <Kernel/Interrupts/IRQHandler.h>
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#include <Kernel/Random.h>
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namespace Kernel {
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class KeyboardDevice : public HIDDevice {
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public:
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using Event = KeyEvent;
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virtual ~KeyboardDevice() override;
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// ^CharacterDevice
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virtual KResultOr<size_t> read(FileDescription&, u64, UserOrKernelBuffer&, size_t) override;
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virtual bool can_read(const FileDescription&, size_t) const override;
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virtual KResultOr<size_t> write(FileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
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virtual bool can_write(const FileDescription&, size_t) const override { return true; }
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// ^HIDDevice
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virtual Type instrument_type() const { return Type::Keyboard; }
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// ^Device
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virtual mode_t required_mode() const override { return 0440; }
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virtual String device_name() const override { return String::formatted("keyboard{}", minor()); }
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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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protected:
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KeyboardDevice();
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mutable SpinLock<u8> m_queue_lock;
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CircularQueue<Event, 16> m_queue;
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// ^CharacterDevice
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virtual const char* class_name() const override { return "KeyboardDevice"; }
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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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bool m_both_shift_keys_pressed { false };
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void key_state_changed(u8 raw, bool pressed);
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};
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}
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