BuildSystem: Move all userpace libraries under the userspace directory

As the number of libraries is increasing, root directory starts to
expand. This adds better organization for libraries

userspace/libraries/LibInput/include/LibInput/KeyEvent.h

@@ -0,0 +1,106 @@
+#pragma once
+
+#include <stdint.h>
+
+namespace LibInput
+{
+
+	/*
+		Key Code:
+			bits 4:0 column (from left)
+			bits 7:5 row    (from top)
+	*/
+
+	#define BANAN_CONSTEVAL_STATIC_ASSERT(cond) do { int dummy = 1 / (cond); } while (false)
+
+	consteval uint8_t keycode_function(uint8_t index)
+	{
+		BANAN_CONSTEVAL_STATIC_ASSERT(index <= 0b11111);
+		return index;
+	}
+
+	consteval uint8_t keycode_normal(uint8_t row, uint8_t col)
+	{
+		BANAN_CONSTEVAL_STATIC_ASSERT(row <= 0b111 - 1);
+		BANAN_CONSTEVAL_STATIC_ASSERT(col < 0b11111 - 8);
+		return ((row + 1) << 5) | col;
+	}
+
+	consteval uint8_t keycode_numpad(uint8_t row, uint8_t col)
+	{
+		BANAN_CONSTEVAL_STATIC_ASSERT(row <= 0b111 - 1);
+		BANAN_CONSTEVAL_STATIC_ASSERT(col <= 8);
+		return ((row + 1) << 5) | (col + 0b11111 - 8);
+	}
+
+	enum class Key
+	{
+		Invalid, None,
+		A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z,
+		A_Ring, A_Umlaut, O_Umlaut,
+		_0, _1, _2, _3, _4, _5, _6, _7, _8, _9,
+		F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12,
+		Insert, PrintScreen, Delete, Home, End, PageUp, PageDown, Enter, Space,
+		ExclamationMark, DoubleQuote, Hashtag, Currency, Percent, Ampersand, Slash, Section, Half,
+		OpenParenthesis, CloseParenthesis, OpenSquareBracket, CloseSquareBracket, OpenCurlyBracket, CloseCurlyBracket,
+		Equals, QuestionMark, Plus, BackSlash, Acute, BackTick, TwoDots, Cedilla, Backspace, AtSign, Pound, Dollar, Euro,
+		Escape, Tab, CapsLock, LeftShift, LeftCtrl, Super, LeftAlt, RightAlt, AltGr = RightAlt, RightCtrl, RightShift,
+		SingleQuote, Asterix, Caret, Tilde, ArrowUp, ArrowDown, ArrowLeft, ArrowRight,
+		Comma, Semicolon, Period, Colon, Hyphen, Underscore, NumLock, ScrollLock, LessThan, GreaterThan, Pipe, Negation, BrokenBar,
+		Numpad0, Numpad1, Numpad2, Numpad3, Numpad4, Numpad5, Numpad6, Numpad7, Numpad8, Numpad9,
+		NumpadPlus, NumpadMinus, NumpadMultiply, NumpadDivide, NumpadEnter, NumpadDecimal,
+		VolumeMute, VolumeUp, VolumeDown, Calculator, MediaPlayPause, MediaStop, MediaPrevious, MediaNext,
+		Count,
+	};
+
+	// KeyEvent with general keycode
+	struct RawKeyEvent
+	{
+		uint16_t modifier;
+		uint8_t keycode;
+	};
+
+	// KeyEvent with key parsed from keycode
+	struct KeyEvent
+	{
+		enum Modifier : uint16_t
+		{
+			LShift		= (1 << 0),
+			RShift		= (1 << 1),
+			LCtrl		= (1 << 2),
+			RCtrl		= (1 << 3),
+			LAlt		= (1 << 4),
+			RAlt		= (1 << 5),
+			CapsLock	= (1 << 6),
+			NumLock		= (1 << 7),
+			ScrollLock	= (1 << 8),
+			Pressed		= (1 << 9),
+		};
+
+		bool lshift()		const { return modifier & Modifier::LShift; }
+		bool rshift()		const { return modifier & Modifier::RShift; }
+		bool shift()		const { return lshift() || rshift(); }
+
+		bool lctrl()		const { return modifier & Modifier::LCtrl; }
+		bool rctrl()		const { return modifier & Modifier::RCtrl; }
+		bool ctrl()			const { return lctrl() || rctrl(); }
+
+		bool lalt()			const { return modifier & Modifier::LAlt; }
+		bool ralt()			const { return modifier & Modifier::RAlt; }
+		bool alt()			const { return lalt() || ralt(); }
+
+		bool caps_lock()	const { return modifier & Modifier::CapsLock; }
+		bool num_lock()		const { return modifier & Modifier::NumLock; }
+		bool scroll_lock()	const { return modifier & Modifier::ScrollLock; }
+
+		bool pressed()		const { return modifier & Modifier::Pressed; }
+		bool released()		const { return !pressed(); }
+
+		uint16_t modifier;
+		Key key;
+	};
+
+	const char* key_to_utf8(Key key, uint16_t modifier);
+	const char* key_to_utf8_ansi(Key key, uint16_t modifier);
+
+}

userspace/libraries/LibInput/include/LibInput/KeyboardLayout.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <BAN/Array.h>
+#include <BAN/StringView.h>
+#include <BAN/UniqPtr.h>
+#include <LibInput/KeyEvent.h>
+
+namespace LibInput
+{
+
+	class KeyboardLayout
+	{
+	public:
+		static BAN::ErrorOr<void> initialize();
+		static KeyboardLayout& get();
+
+		KeyEvent key_event_from_raw(RawKeyEvent);
+		BAN::ErrorOr<void> load_from_file(BAN::StringView path);
+
+	private:
+		KeyboardLayout();
+
+	private:
+		BAN::Array<Key, 0xFF> m_keycode_to_key_normal;
+		BAN::Array<Key, 0xFF> m_keycode_to_key_shift;
+		BAN::Array<Key, 0xFF> m_keycode_to_key_altgr;
+		friend class BAN::UniqPtr<KeyboardLayout>;
+	};
+
+}

userspace/libraries/LibInput/include/LibInput/MouseEvent.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include <stdint.h>
+
+namespace LibInput
+{
+
+	enum class MouseButton
+	{
+		Left, Right, Middle, Extra1, Extra2
+	};
+
+	struct MouseButtonEvent
+	{
+		MouseButton button;
+		bool pressed;
+	};
+
+	struct MouseMoveEvent
+	{
+		int32_t rel_x;
+		int32_t rel_y;
+	};
+
+	struct MouseScrollEvent
+	{
+		int32_t scroll;
+	};
+
+	enum class MouseEventType
+	{
+		MouseButtonEvent,
+		MouseMoveEvent,
+		MouseScrollEvent,
+	};
+
+	struct MouseEvent
+	{
+		MouseEventType type;
+		union
+		{
+			MouseButtonEvent button_event;
+			MouseMoveEvent move_event;
+			MouseScrollEvent scroll_event;
+		};
+	};
+
+}