88 lines
3.3 KiB
C#
88 lines
3.3 KiB
C#
using System.Collections.Generic;
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using Engine.Core;
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using Engine.Systems.Input;
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using SDL3;
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namespace Engine.Integration.SDL3;
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public class Sdl3KeyboardInputs : Behaviour, ISdl3EventProcessor, IButtonInputs<SDL.Keycode>
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{
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public IButtonInputs<SDL.Keycode>.InputEvent OnAnyButtonPressed { get; } = new();
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public IButtonInputs<SDL.Keycode>.InputEvent OnAnyButtonReleased { get; } = new();
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private readonly Dictionary<SDL.Keycode, IButtonInputs<SDL.Keycode>.InputEvent> OnPressed = new(256);
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private readonly Dictionary<SDL.Keycode, IButtonInputs<SDL.Keycode>.InputEvent> OnReleased = new(256);
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private readonly FastList<SDL.Keycode> currentlyPressedKeys = [];
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public void RegisterOnPress(SDL.Keycode key, IButtonInputs<SDL.Keycode>.InputEvent.EventHandler callback)
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{
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if (!OnPressed.TryGetValue(key, out IButtonInputs<SDL.Keycode>.InputEvent? delegateCallback))
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{
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delegateCallback = new();
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OnPressed.Add(key, delegateCallback);
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}
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delegateCallback.AddListener(callback);
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}
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public void UnregisterOnPress(SDL.Keycode key, IButtonInputs<SDL.Keycode>.InputEvent.EventHandler callback)
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{
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if (OnPressed.TryGetValue(key, out IButtonInputs<SDL.Keycode>.InputEvent? delegateCallback))
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delegateCallback.RemoveListener(callback);
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}
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public void RegisterOnRelease(SDL.Keycode key, IButtonInputs<SDL.Keycode>.InputEvent.EventHandler callback)
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{
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if (!OnReleased.TryGetValue(key, out IButtonInputs<SDL.Keycode>.InputEvent? delegateCallback))
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{
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delegateCallback = new();
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OnReleased.Add(key, delegateCallback);
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}
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delegateCallback.AddListener(callback);
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}
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public void UnregisterOnRelease(SDL.Keycode key, IButtonInputs<SDL.Keycode>.InputEvent.EventHandler callback)
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{
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if (OnReleased.TryGetValue(key, out IButtonInputs<SDL.Keycode>.InputEvent? delegateCallback))
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delegateCallback.RemoveListener(callback);
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}
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public bool IsPressed(SDL.Keycode button) => currentlyPressedKeys.Contains(button);
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public void Process(SDL.Event sdlEvent)
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{
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switch ((SDL.EventType)sdlEvent.Type)
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{
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case SDL.EventType.KeyDown:
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SDL.Keycode currentlyPressedKey = sdlEvent.Key.Key;
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if (IsPressed(currentlyPressedKey))
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return;
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currentlyPressedKeys.Add(currentlyPressedKey);
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if (OnPressed.TryGetValue(currentlyPressedKey, out IButtonInputs<SDL.Keycode>.InputEvent? pressCallback))
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pressCallback?.Invoke(this, new(currentlyPressedKey));
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OnAnyButtonPressed?.Invoke(this, new(currentlyPressedKey));
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return;
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case SDL.EventType.KeyUp:
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SDL.Keycode previouslyPressedKey = sdlEvent.Key.Key;
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if (!IsPressed(previouslyPressedKey))
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return;
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currentlyPressedKeys.Remove(previouslyPressedKey);
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if (OnReleased.TryGetValue(previouslyPressedKey, out IButtonInputs<SDL.Keycode>.InputEvent? releaseCallback))
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releaseCallback?.Invoke(this, new(previouslyPressedKey));
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OnAnyButtonReleased?.Invoke(this, new(previouslyPressedKey));
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return;
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}
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}
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}
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