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Nerfed/Nerfed.Runtime/Input/Devices/Keyboard.cs

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C#
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Setup entry point + integrated moonworks stuff
2024-07-05 14:32:58 +02:00
using System.Runtime.InteropServices;
using System.Text;
using SDL2;
namespace Nerfed.Runtime;
public static class Keyboard
{
private static readonly List<char> textInput = new List<char>();
private const int maxPressedKeys = 8;
private static readonly List<Key> keys = new List<Key>(maxPressedKeys);
private static readonly List<Key> lastKeys = new List<Key>(maxPressedKeys);
/// <summary>
/// True if the key was pressed or continued to be held down this frame.
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static bool IsKeyDown(Key key)
{
return HasKey(keys, key);
}
/// <summary>
/// True if the key was pressed this frame.
/// </summary>
public static bool IsKeyPressed(Key key)
{
return HasKey(keys, key) && !HasKey(lastKeys, key);
}
/// <summary>
/// True if the key was released or continued to be released this frame.
/// </summary>
public static bool IsKeyUp(Key key)
{
return !HasKey(keys, key);
}
/// <summary>
/// True if the key was released this frame.
/// </summary>
public static bool IsKeyReleased(Key key)
{
return !HasKey(keys, key) && HasKey(lastKeys, key);
}
public static ReadOnlySpan<Key> GetPressedKeys()
{
return CollectionsMarshal.AsSpan(keys);
}
public static ReadOnlySpan<char> GetTextInput()
{
return CollectionsMarshal.AsSpan(textInput);
}
internal static void Update()
{
textInput.Clear();
lastKeys.Clear();
if (keys.Count > 0)
{
lastKeys.AddRange(keys);
}
}
private static bool HasKey(List<Key> list, Key key)
{
for (int i = 0; i < list.Count; i++)
{
if (keys[i] == key)
{
return true;
}
}
return false;
}
internal static void ProcessEvent(ref SDL.SDL_Event ev)
{
switch (ev.type)
{
case SDL.SDL_EventType.SDL_TEXTINPUT:
ProcessTextInputEvent(ref ev.text);
break;
case SDL.SDL_EventType.SDL_KEYDOWN:
ProcessKeyDownEvent(ref ev.key);
break;
case SDL.SDL_EventType.SDL_KEYUP:
ProcessKeyUpEvent(ref ev.key);
break;
}
}
private static unsafe void ProcessTextInputEvent(ref SDL.SDL_TextInputEvent evt)
{
// Based on the SDL2# LPUtf8StrMarshaler
int MeasureStringLength(byte* ptr)
{
int bytes;
for (bytes = 0; *ptr != 0; ptr += 1, bytes += 1) ;
return bytes;
}
fixed (byte* textPtr = evt.text)
{
int bytes = MeasureStringLength(textPtr);
if (bytes > 0)
{
/* UTF8 will never encode more characters
* than bytes in a string, so bytes is a
* suitable upper estimate of size needed
*/
char* charsBuffer = stackalloc char[bytes];
int chars = Encoding.UTF8.GetChars(
textPtr,
bytes,
charsBuffer,
bytes
);
if (chars > 0)
{
textInput.AddRange(new ReadOnlySpan<char>(charsBuffer, chars));
}
}
}
}
private static void ProcessKeyDownEvent(ref SDL.SDL_KeyboardEvent ev)
{
Key key = ConvertScancode(ev.keysym.scancode);
SetKeyState(key, KeyState.Down);
}
private static void ProcessKeyUpEvent(ref SDL.SDL_KeyboardEvent ev)
{
Key key = ConvertScancode(ev.keysym.scancode);
SetKeyState(key, KeyState.Up);
}
public static void SetKeyState(Key key, KeyState state)
{
if (keys.Count >= maxPressedKeys)
{
return;
}
if (state == KeyState.Down)
{
if (!keys.Contains(key))
{
keys.Add(key);
}
}
else if (state == KeyState.Up)
{
keys.Remove(key);
}
}
private static Key ConvertScancode(SDL.SDL_Scancode scancode)
{
switch (scancode)
{
case SDL.SDL_Scancode.SDL_SCANCODE_A: return Key.A;
case SDL.SDL_Scancode.SDL_SCANCODE_B: return Key.B;
case SDL.SDL_Scancode.SDL_SCANCODE_C: return Key.C;
case SDL.SDL_Scancode.SDL_SCANCODE_D: return Key.D;
case SDL.SDL_Scancode.SDL_SCANCODE_E: return Key.E;
case SDL.SDL_Scancode.SDL_SCANCODE_F: return Key.F;
case SDL.SDL_Scancode.SDL_SCANCODE_G: return Key.G;
case SDL.SDL_Scancode.SDL_SCANCODE_H: return Key.H;
case SDL.SDL_Scancode.SDL_SCANCODE_I: return Key.I;
case SDL.SDL_Scancode.SDL_SCANCODE_J: return Key.J;
case SDL.SDL_Scancode.SDL_SCANCODE_K: return Key.K;
case SDL.SDL_Scancode.SDL_SCANCODE_L: return Key.L;
case SDL.SDL_Scancode.SDL_SCANCODE_M: return Key.M;
case SDL.SDL_Scancode.SDL_SCANCODE_N: return Key.N;
case SDL.SDL_Scancode.SDL_SCANCODE_O: return Key.O;
case SDL.SDL_Scancode.SDL_SCANCODE_P: return Key.P;
case SDL.SDL_Scancode.SDL_SCANCODE_Q: return Key.Q;
case SDL.SDL_Scancode.SDL_SCANCODE_R: return Key.R;
case SDL.SDL_Scancode.SDL_SCANCODE_S: return Key.S;
case SDL.SDL_Scancode.SDL_SCANCODE_T: return Key.T;
case SDL.SDL_Scancode.SDL_SCANCODE_U: return Key.U;
case SDL.SDL_Scancode.SDL_SCANCODE_V: return Key.V;
case SDL.SDL_Scancode.SDL_SCANCODE_W: return Key.W;
case SDL.SDL_Scancode.SDL_SCANCODE_X: return Key.X;
case SDL.SDL_Scancode.SDL_SCANCODE_Y: return Key.Y;
case SDL.SDL_Scancode.SDL_SCANCODE_Z: return Key.Z;
case SDL.SDL_Scancode.SDL_SCANCODE_1: return Key.D1;
case SDL.SDL_Scancode.SDL_SCANCODE_2: return Key.D2;
case SDL.SDL_Scancode.SDL_SCANCODE_3: return Key.D3;
case SDL.SDL_Scancode.SDL_SCANCODE_4: return Key.D4;
case SDL.SDL_Scancode.SDL_SCANCODE_5: return Key.D5;
case SDL.SDL_Scancode.SDL_SCANCODE_6: return Key.D6;
case SDL.SDL_Scancode.SDL_SCANCODE_7: return Key.D7;
case SDL.SDL_Scancode.SDL_SCANCODE_8: return Key.D8;
case SDL.SDL_Scancode.SDL_SCANCODE_9: return Key.D9;
case SDL.SDL_Scancode.SDL_SCANCODE_0: return Key.D0;
case SDL.SDL_Scancode.SDL_SCANCODE_RETURN: return Key.Enter;
case SDL.SDL_Scancode.SDL_SCANCODE_ESCAPE: return Key.Escape;
case SDL.SDL_Scancode.SDL_SCANCODE_BACKSPACE: return Key.Backspace;
case SDL.SDL_Scancode.SDL_SCANCODE_TAB: return Key.Tab;
case SDL.SDL_Scancode.SDL_SCANCODE_SPACE: return Key.Space;
case SDL.SDL_Scancode.SDL_SCANCODE_MINUS: return Key.Minus;
case SDL.SDL_Scancode.SDL_SCANCODE_EQUALS: return Key.Equals;
case SDL.SDL_Scancode.SDL_SCANCODE_LEFTBRACKET: return Key.LeftBracket;
case SDL.SDL_Scancode.SDL_SCANCODE_RIGHTBRACKET: return Key.RightBracket;
case SDL.SDL_Scancode.SDL_SCANCODE_BACKSLASH: return Key.Backslash;
case SDL.SDL_Scancode.SDL_SCANCODE_SEMICOLON: return Key.Semicolon;
case SDL.SDL_Scancode.SDL_SCANCODE_APOSTROPHE: return Key.Apostrophe;
case SDL.SDL_Scancode.SDL_SCANCODE_GRAVE: return Key.Tilde;
case SDL.SDL_Scancode.SDL_SCANCODE_COMMA: return Key.Comma;
case SDL.SDL_Scancode.SDL_SCANCODE_PERIOD: return Key.Period;
case SDL.SDL_Scancode.SDL_SCANCODE_SLASH: return Key.Slash;
case SDL.SDL_Scancode.SDL_SCANCODE_CAPSLOCK: return Key.CapsLock;
case SDL.SDL_Scancode.SDL_SCANCODE_F1: return Key.F1;
case SDL.SDL_Scancode.SDL_SCANCODE_F2: return Key.F2;
case SDL.SDL_Scancode.SDL_SCANCODE_F3: return Key.F3;
case SDL.SDL_Scancode.SDL_SCANCODE_F4: return Key.F4;
case SDL.SDL_Scancode.SDL_SCANCODE_F5: return Key.F5;
case SDL.SDL_Scancode.SDL_SCANCODE_F6: return Key.F6;
case SDL.SDL_Scancode.SDL_SCANCODE_F7: return Key.F7;
case SDL.SDL_Scancode.SDL_SCANCODE_F8: return Key.F8;
case SDL.SDL_Scancode.SDL_SCANCODE_F9: return Key.F9;
case SDL.SDL_Scancode.SDL_SCANCODE_F10: return Key.F10;
case SDL.SDL_Scancode.SDL_SCANCODE_F11: return Key.F11;
case SDL.SDL_Scancode.SDL_SCANCODE_F12: return Key.F12;
case SDL.SDL_Scancode.SDL_SCANCODE_PRINTSCREEN: return Key.PrintScreen;
case SDL.SDL_Scancode.SDL_SCANCODE_SCROLLLOCK: return Key.Scroll;
case SDL.SDL_Scancode.SDL_SCANCODE_PAUSE: return Key.Pause;
case SDL.SDL_Scancode.SDL_SCANCODE_INSERT: return Key.Insert;
case SDL.SDL_Scancode.SDL_SCANCODE_HOME: return Key.Home;
case SDL.SDL_Scancode.SDL_SCANCODE_PAGEUP: return Key.PageUp;
case SDL.SDL_Scancode.SDL_SCANCODE_DELETE: return Key.Delete;
case SDL.SDL_Scancode.SDL_SCANCODE_END: return Key.End;
case SDL.SDL_Scancode.SDL_SCANCODE_PAGEDOWN: return Key.PageDown;
case SDL.SDL_Scancode.SDL_SCANCODE_RIGHT: return Key.Right;
case SDL.SDL_Scancode.SDL_SCANCODE_LEFT: return Key.Left;
case SDL.SDL_Scancode.SDL_SCANCODE_DOWN: return Key.Down;
case SDL.SDL_Scancode.SDL_SCANCODE_UP: return Key.Up;
case SDL.SDL_Scancode.SDL_SCANCODE_NUMLOCKCLEAR: return Key.NumLock;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_DIVIDE: return Key.Divide;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_MULTIPLY: return Key.Multiply;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_MINUS: return Key.Subtract;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_PLUS: return Key.Add;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_ENTER: return Key.Enter;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_1: return Key.NumPad1;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_2: return Key.NumPad2;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_3: return Key.NumPad3;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_4: return Key.NumPad4;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_5: return Key.NumPad5;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_6: return Key.NumPad6;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_7: return Key.NumPad7;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_8: return Key.NumPad8;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_9: return Key.NumPad9;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_0: return Key.NumPad0;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_PERIOD: return Key.Period;
case SDL.SDL_Scancode.SDL_SCANCODE_APPLICATION: return Key.Apps;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_EQUALS: return Key.Equals;
case SDL.SDL_Scancode.SDL_SCANCODE_F13: return Key.F13;
case SDL.SDL_Scancode.SDL_SCANCODE_F14: return Key.F14;
case SDL.SDL_Scancode.SDL_SCANCODE_F15: return Key.F15;
case SDL.SDL_Scancode.SDL_SCANCODE_F16: return Key.F16;
case SDL.SDL_Scancode.SDL_SCANCODE_F17: return Key.F17;
case SDL.SDL_Scancode.SDL_SCANCODE_F18: return Key.F18;
case SDL.SDL_Scancode.SDL_SCANCODE_F19: return Key.F19;
case SDL.SDL_Scancode.SDL_SCANCODE_F20: return Key.F20;
case SDL.SDL_Scancode.SDL_SCANCODE_F21: return Key.F21;
case SDL.SDL_Scancode.SDL_SCANCODE_F22: return Key.F22;
case SDL.SDL_Scancode.SDL_SCANCODE_F23: return Key.F23;
case SDL.SDL_Scancode.SDL_SCANCODE_F24: return Key.F24;
case SDL.SDL_Scancode.SDL_SCANCODE_EXECUTE: return Key.Execute;
case SDL.SDL_Scancode.SDL_SCANCODE_HELP: return Key.Help;
case SDL.SDL_Scancode.SDL_SCANCODE_MENU: return Key.Apps;
case SDL.SDL_Scancode.SDL_SCANCODE_SELECT: return Key.Select;
case SDL.SDL_Scancode.SDL_SCANCODE_KP_COMMA: return Key.Comma;
case SDL.SDL_Scancode.SDL_SCANCODE_LCTRL: return Key.LeftControl;
case SDL.SDL_Scancode.SDL_SCANCODE_LSHIFT: return Key.LeftShift;
case SDL.SDL_Scancode.SDL_SCANCODE_LALT: return Key.LeftAlt;
case SDL.SDL_Scancode.SDL_SCANCODE_LGUI: return Key.LeftSuper;
case SDL.SDL_Scancode.SDL_SCANCODE_RCTRL: return Key.RightControl;
case SDL.SDL_Scancode.SDL_SCANCODE_RSHIFT: return Key.RightShift;
case SDL.SDL_Scancode.SDL_SCANCODE_RALT: return Key.RightAlt;
case SDL.SDL_Scancode.SDL_SCANCODE_RGUI: return Key.RightSuper;
default: return Key.None;
}
}
}
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