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ladybird/Kernel/API/KeyCode.h
Liav A bfffe88de5 Kernel/HID: Untie the PS2 protocol, i8042 hardware and generic devices 
For a very long time, the kernel had only support for basic PS/2 devices
such as the PS2 AT keyboard and regular PS2 mouse (with a scroll wheel).

To adapt to this, we had very simple abstractions in place, essentially,
the PS2 devices were registered as IRQ handlers (IRQ 1 and 12), and when
an interrupt was triggered, we simply had to tell the I8042Controller to
fetch a byte for us, then send it back to the appropriate device for
further processing and queueing of either a key event, or a mouse packet
so userspace can do something meaningful about it.

When we added the VMWare mouse integration feature it was easily adapted
to this paradigm, requiring small changes across the handling code for
these devices.

This patch is a major cleanup for any future advancements in the HID
subsystem.
It ensures we do things in a much more sane manner:
- We stop using LockRefPtrs. Currently, after the initialization of the
  i8042 controller, we never have to change RefPtrs in that class, as we
  simply don't support PS2 hotplugging currently.
  Also, we remove the unnecessary getters for keyboard and mouse devices
  which also returned a LockRefPtr.
- There's a clear separation between PS2 devices and the actual device
  nodes that normally exist in /dev. PS2 devices are not polled, because
  when the user uses these devices, they will trigger an IRQ which when
  is handled, could produce either a MousePacket or KeyEvent, depending
  on the device state.
  The separation is crucial for buses that are polled, for example - USB
  is a polled bus and will not generate an IRQ for HID devices.
- There's a clear separation in roles of each structure. The PS2 devices
  which are attached to a I8042Controller object are managing the device
  state, while the generic MouseDevice and KeyboardDevice manage all
  related tasks of a CharacterDevice, as well as interpreting scan code
  events and mouse relative/absolute coordinates.
2023-04-09 18:11:37 +02:00

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Types.h>
#define ENUMERATE_KEY_CODES \
__ENUMERATE_KEY_CODE(Invalid, "Invalid") \
__ENUMERATE_KEY_CODE(Escape, "Escape") \
__ENUMERATE_KEY_CODE(Tab, "Tab") \
__ENUMERATE_KEY_CODE(Backspace, "Backspace") \
__ENUMERATE_KEY_CODE(Return, "Return") \
__ENUMERATE_KEY_CODE(Insert, "Insert") \
__ENUMERATE_KEY_CODE(Delete, "Delete") \
__ENUMERATE_KEY_CODE(PrintScreen, "PrintScreen") \
__ENUMERATE_KEY_CODE(SysRq, "SysRq") \
__ENUMERATE_KEY_CODE(Home, "Home") \
__ENUMERATE_KEY_CODE(End, "End") \
__ENUMERATE_KEY_CODE(Left, "Left") \
__ENUMERATE_KEY_CODE(Up, "Up") \
__ENUMERATE_KEY_CODE(Right, "Right") \
__ENUMERATE_KEY_CODE(Down, "Down") \
__ENUMERATE_KEY_CODE(PageUp, "PageUp") \
__ENUMERATE_KEY_CODE(PageDown, "PageDown") \
__ENUMERATE_KEY_CODE(LeftShift, "LeftShift") \
__ENUMERATE_KEY_CODE(RightShift, "RightShift") \
__ENUMERATE_KEY_CODE(Control, "Ctrl") \
__ENUMERATE_KEY_CODE(Alt, "Alt") \
__ENUMERATE_KEY_CODE(CapsLock, "CapsLock") \
__ENUMERATE_KEY_CODE(NumLock, "NumLock") \
__ENUMERATE_KEY_CODE(ScrollLock, "ScrollLock") \
__ENUMERATE_KEY_CODE(F1, "F1") \
__ENUMERATE_KEY_CODE(F2, "F2") \
__ENUMERATE_KEY_CODE(F3, "F3") \
__ENUMERATE_KEY_CODE(F4, "F4") \
__ENUMERATE_KEY_CODE(F5, "F5") \
__ENUMERATE_KEY_CODE(F6, "F6") \
__ENUMERATE_KEY_CODE(F7, "F7") \
__ENUMERATE_KEY_CODE(F8, "F8") \
__ENUMERATE_KEY_CODE(F9, "F9") \
__ENUMERATE_KEY_CODE(F10, "F10") \
__ENUMERATE_KEY_CODE(F11, "F11") \
__ENUMERATE_KEY_CODE(F12, "F12") \
__ENUMERATE_KEY_CODE(Space, "Space") \
__ENUMERATE_KEY_CODE(ExclamationPoint, "!") \
__ENUMERATE_KEY_CODE(DoubleQuote, "\"") \
__ENUMERATE_KEY_CODE(Hashtag, "#") \
__ENUMERATE_KEY_CODE(Dollar, "$") \
__ENUMERATE_KEY_CODE(Percent, "%") \
__ENUMERATE_KEY_CODE(Ampersand, "&") \
__ENUMERATE_KEY_CODE(Apostrophe, "'") \
__ENUMERATE_KEY_CODE(LeftParen, "(") \
__ENUMERATE_KEY_CODE(RightParen, ")") \
__ENUMERATE_KEY_CODE(Asterisk, "*") \
__ENUMERATE_KEY_CODE(Plus, "+") \
__ENUMERATE_KEY_CODE(Comma, ",") \
__ENUMERATE_KEY_CODE(Minus, "-") \
__ENUMERATE_KEY_CODE(Period, ".") \
__ENUMERATE_KEY_CODE(Slash, "/") \
__ENUMERATE_KEY_CODE(0, "0") \
__ENUMERATE_KEY_CODE(1, "1") \
__ENUMERATE_KEY_CODE(2, "2") \
__ENUMERATE_KEY_CODE(3, "3") \
__ENUMERATE_KEY_CODE(4, "4") \
__ENUMERATE_KEY_CODE(5, "5") \
__ENUMERATE_KEY_CODE(6, "6") \
__ENUMERATE_KEY_CODE(7, "7") \
__ENUMERATE_KEY_CODE(8, "8") \
__ENUMERATE_KEY_CODE(9, "9") \
__ENUMERATE_KEY_CODE(Colon, ":") \
__ENUMERATE_KEY_CODE(Semicolon, ";") \
__ENUMERATE_KEY_CODE(LessThan, "<") \
__ENUMERATE_KEY_CODE(Equal, "=") \
__ENUMERATE_KEY_CODE(GreaterThan, ">") \
__ENUMERATE_KEY_CODE(QuestionMark, "?") \
__ENUMERATE_KEY_CODE(AtSign, "@") \
__ENUMERATE_KEY_CODE(A, "A") \
__ENUMERATE_KEY_CODE(B, "B") \
__ENUMERATE_KEY_CODE(C, "C") \
__ENUMERATE_KEY_CODE(D, "D") \
__ENUMERATE_KEY_CODE(E, "E") \
__ENUMERATE_KEY_CODE(F, "F") \
__ENUMERATE_KEY_CODE(G, "G") \
__ENUMERATE_KEY_CODE(H, "H") \
__ENUMERATE_KEY_CODE(I, "I") \
__ENUMERATE_KEY_CODE(J, "J") \
__ENUMERATE_KEY_CODE(K, "K") \
__ENUMERATE_KEY_CODE(L, "L") \
__ENUMERATE_KEY_CODE(M, "M") \
__ENUMERATE_KEY_CODE(N, "N") \
__ENUMERATE_KEY_CODE(O, "O") \
__ENUMERATE_KEY_CODE(P, "P") \
__ENUMERATE_KEY_CODE(Q, "Q") \
__ENUMERATE_KEY_CODE(R, "R") \
__ENUMERATE_KEY_CODE(S, "S") \
__ENUMERATE_KEY_CODE(T, "T") \
__ENUMERATE_KEY_CODE(U, "U") \
__ENUMERATE_KEY_CODE(V, "V") \
__ENUMERATE_KEY_CODE(W, "W") \
__ENUMERATE_KEY_CODE(X, "X") \
__ENUMERATE_KEY_CODE(Y, "Y") \
__ENUMERATE_KEY_CODE(Z, "Z") \
__ENUMERATE_KEY_CODE(LeftBracket, "[") \
__ENUMERATE_KEY_CODE(RightBracket, "]") \
__ENUMERATE_KEY_CODE(Backslash, "\\") \
__ENUMERATE_KEY_CODE(Circumflex, "^") \
__ENUMERATE_KEY_CODE(Underscore, "_") \
__ENUMERATE_KEY_CODE(LeftBrace, "{") \
__ENUMERATE_KEY_CODE(RightBrace, "}") \
__ENUMERATE_KEY_CODE(Pipe, "|") \
__ENUMERATE_KEY_CODE(Tilde, "~") \
__ENUMERATE_KEY_CODE(Backtick, "`") \
__ENUMERATE_KEY_CODE(Super, "Super") \
__ENUMERATE_KEY_CODE(Menu, "Menu")
enum KeyCode : u8 {
#define __ENUMERATE_KEY_CODE(name, ui_name) Key_##name,
ENUMERATE_KEY_CODES
#undef __ENUMERATE_KEY_CODE
Key_Shift
= Key_LeftShift,
};
int const key_code_count = Key_Menu;
enum KeyModifier {
Mod_None = 0x00,
Mod_Alt = (1 << 0),
Mod_Ctrl = (1 << 1),
Mod_Shift = (1 << 2),
Mod_Super = (1 << 3),
Mod_AltGr = (1 << 4),
Mod_Mask = Mod_Alt | Mod_Ctrl | Mod_Shift | Mod_Super | Mod_AltGr,
Is_Press = 0x80,
};
struct KeyEvent {
KeyCode key { Key_Invalid };
u32 scancode { 0 };
u32 code_point { 0 };
u8 flags { 0 };
bool caps_lock_on { false };
bool e0_prefix { false };
bool alt() const { return flags & Mod_Alt; }
bool ctrl() const { return flags & Mod_Ctrl; }
bool shift() const { return flags & Mod_Shift; }
bool super() const { return flags & Mod_Super; }
bool altgr() const { return flags & Mod_AltGr; }
unsigned modifiers() const { return flags & Mod_Mask; }
bool is_press() const { return flags & Is_Press; }
};
inline char const* key_code_to_string(KeyCode key)
{
switch (key) {
#define __ENUMERATE_KEY_CODE(name, ui_name) \
case Key_##name: \
return ui_name;
ENUMERATE_KEY_CODES
#undef __ENUMERATE_KEY_CODE
default:
return nullptr;
}
}
inline KeyCode code_point_to_key_code(u32 code_point)
{
switch (code_point) {
#define MATCH_ALPHA(letter) \
case #letter[0]: \
case #letter[0] + 32: \
return KeyCode::Key_##letter;
MATCH_ALPHA(A)
MATCH_ALPHA(B)
MATCH_ALPHA(C)
MATCH_ALPHA(D)
MATCH_ALPHA(E)
MATCH_ALPHA(F)
MATCH_ALPHA(G)
MATCH_ALPHA(H)
MATCH_ALPHA(I)
MATCH_ALPHA(J)
MATCH_ALPHA(K)
MATCH_ALPHA(L)
MATCH_ALPHA(M)
MATCH_ALPHA(N)
MATCH_ALPHA(O)
MATCH_ALPHA(P)
MATCH_ALPHA(Q)
MATCH_ALPHA(R)
MATCH_ALPHA(S)
MATCH_ALPHA(T)
MATCH_ALPHA(U)
MATCH_ALPHA(V)
MATCH_ALPHA(W)
MATCH_ALPHA(X)
MATCH_ALPHA(Y)
MATCH_ALPHA(Z)
#undef MATCH_ALPHA
#define MATCH_KEY(name, character) \
case character: \
return KeyCode::Key_##name;
MATCH_KEY(ExclamationPoint, '!')
MATCH_KEY(DoubleQuote, '"')
MATCH_KEY(Hashtag, '#')
MATCH_KEY(Dollar, '$')
MATCH_KEY(Percent, '%')
MATCH_KEY(Ampersand, '&')
MATCH_KEY(Apostrophe, '\'')
MATCH_KEY(LeftParen, '(')
MATCH_KEY(RightParen, ')')
MATCH_KEY(Asterisk, '*')
MATCH_KEY(Plus, '+')
MATCH_KEY(Comma, ',')
MATCH_KEY(Minus, '-')
MATCH_KEY(Period, '.')
MATCH_KEY(Slash, '/')
MATCH_KEY(0, '0')
MATCH_KEY(1, '1')
MATCH_KEY(2, '2')
MATCH_KEY(3, '3')
MATCH_KEY(4, '4')
MATCH_KEY(5, '5')
MATCH_KEY(6, '6')
MATCH_KEY(7, '7')
MATCH_KEY(8, '8')
MATCH_KEY(9, '9')
MATCH_KEY(Colon, ':')
MATCH_KEY(Semicolon, ';')
MATCH_KEY(LessThan, '<')
MATCH_KEY(Equal, '=')
MATCH_KEY(GreaterThan, '>')
MATCH_KEY(QuestionMark, '?')
MATCH_KEY(AtSign, '@')
MATCH_KEY(LeftBracket, '[')
MATCH_KEY(RightBracket, ']')
MATCH_KEY(Backslash, '\\')
MATCH_KEY(Circumflex, '^')
MATCH_KEY(Underscore, '_')
MATCH_KEY(LeftBrace, '{')
MATCH_KEY(RightBrace, '}')
MATCH_KEY(Pipe, '|')
MATCH_KEY(Tilde, '~')
MATCH_KEY(Backtick, '`')
MATCH_KEY(Space, ' ')
MATCH_KEY(Tab, '\t')
MATCH_KEY(Backspace, '\b')
#undef MATCH_KEY
default:
return KeyCode::Key_Invalid;
}
}
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