Added input handlers by @Valoeghese

src/main/java/com/github/halotroop/litecraft/input/InitialPressHandler.java

@@ -0,0 +1,21 @@
+package com.github.halotroop.litecraft.input;
+
+/*
+ * Author: Valoeghese
+ */
+public final class InitialPressHandler implements KeyListener
+{
+	public InitialPressHandler(KeyCallback callback)
+	{ this.callback = callback; }
+
+	private boolean activatedPreviously = false;
+	private final KeyCallback callback;
+
+	@Override
+	public void listen(boolean active)
+	{
+		if (!activatedPreviously && active)
+		{ callback.onCallback(); }
+		activatedPreviously = active;
+	}
+}

src/main/java/com/github/halotroop/litecraft/input/Input.java

@@ -0,0 +1,34 @@
+package com.github.halotroop.litecraft.input;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/*
+ * Author: Valoeghese
+ */
+public class Input
+{
+	private static final Map<Keybind, List<KeyCallback>> CALLBACKS = new HashMap<>();
+	private static final Map<Keybind, List<KeyListener>> LISTENERS = new HashMap<>();
+
+	public static void addPressCallback(Keybind key, KeyCallback callback)
+	{ CALLBACKS.computeIfAbsent(key, listener -> new ArrayList<>()).add(callback); }
+
+	public static void addListener(Keybind key, KeyListener callback)
+	{ LISTENERS.computeIfAbsent(key, listener -> new ArrayList<>()).add(callback); }
+
+	public static void invokeAllListeners()
+	{
+		CALLBACKS.forEach((keybind, listeners) ->
+		{
+			if (keybind.isActive())
+			{ listeners.forEach(callback -> callback.onCallback()); }
+		});
+		LISTENERS.forEach((keybind, listeners) ->
+		{
+			listeners.forEach(listener -> listener.listen(keybind.isActive()));
+		});
+	}
+}

src/main/java/com/github/halotroop/litecraft/input/KeyCallback.java

@@ -0,0 +1,9 @@
+package com.github.halotroop.litecraft.input;
+
+/*
+ * Author: Valoeghese
+ */
+public interface KeyCallback
+{
+	public void onCallback();
+}

src/main/java/com/github/halotroop/litecraft/input/KeyCallbackHandler.java

@@ -0,0 +1,33 @@
+package com.github.halotroop.litecraft.input;
+
+import org.lwjgl.glfw.GLFW;
+import org.lwjgl.glfw.GLFWKeyCallback;
+
+/*
+ * Author: Valoeghese
+ */
+public class KeyCallbackHandler extends GLFWKeyCallback
+{
+	private KeyCallbackHandler()
+	{}
+
+	private static final KeyCallbackHandler INSTANCE = new KeyCallbackHandler();
+
+	public static void trackWindow(long window)
+	{ GLFW.glfwSetKeyCallback(window, INSTANCE); }
+
+	public static boolean[] keys = new boolean[GLFW.GLFW_KEY_LAST];
+
+	@Override
+	public void invoke(long window, int key, int scancode, int action, int mods)
+	{
+		try
+		{
+			keys[key] = action != GLFW.GLFW_RELEASE;
+		}
+		catch (ArrayIndexOutOfBoundsException e)
+		{
+			// Probably just changing the volume
+		}
+	}
+}

src/main/java/com/github/halotroop/litecraft/input/KeyListener.java

@@ -0,0 +1,9 @@
+package com.github.halotroop.litecraft.input;
+
+/*
+ * Author: Valoeghese
+ */
+public interface KeyListener
+{
+	public void listen(boolean active);
+}

src/main/java/com/github/halotroop/litecraft/input/Keybind.java

@@ -0,0 +1,30 @@
+package com.github.halotroop.litecraft.input;
+
+import org.lwjgl.glfw.GLFW;
+
+/*
+ * Author: Valoeghese
+ */
+public final class Keybind
+{
+	public int value;
+	public boolean mouse;
+	public static final Keybind MOVE_UP = new Keybind(GLFW.GLFW_KEY_W, false);
+	public static final Keybind MOVE_DOWN = new Keybind(GLFW.GLFW_KEY_S, false);
+	public static final Keybind MOVE_LEFT = new Keybind(GLFW.GLFW_KEY_A, false);
+	public static final Keybind MOVE_RIGHT = new Keybind(GLFW.GLFW_KEY_D, false);
+	public static final Keybind USE = new Keybind(GLFW.GLFW_MOUSE_BUTTON_1, true);
+	public static final Keybind SELECT_0 = new Keybind(GLFW.GLFW_KEY_1, false);
+	public static final Keybind SELECT_1 = new Keybind(GLFW.GLFW_KEY_2, false);
+	public static final Keybind SELECT_2 = new Keybind(GLFW.GLFW_KEY_3, false);
+	public static final Keybind EXIT = new Keybind(GLFW.GLFW_KEY_ESCAPE, false);
+
+	public Keybind(int initValue, boolean isMouse)
+	{
+		this.value = initValue;
+		this.mouse = isMouse;
+	}
+
+	public boolean isActive()
+	{ return mouse ? MouseCallbackHandler.buttons[value] : KeyCallbackHandler.keys[value]; }
+}

src/main/java/com/github/halotroop/litecraft/input/MouseCallbackHandler.java

@@ -0,0 +1,24 @@
+package com.github.halotroop.litecraft.input;
+
+import org.lwjgl.glfw.GLFW;
+import org.lwjgl.glfw.GLFWMouseButtonCallback;
+
+/*
+ * Author: Valoeghese
+ */
+public class MouseCallbackHandler extends GLFWMouseButtonCallback
+{
+	private MouseCallbackHandler()
+	{}
+
+	private static final MouseCallbackHandler INSTANCE = new MouseCallbackHandler();
+
+	public static void trackWindow(long window)
+	{ GLFW.glfwSetMouseButtonCallback(window, INSTANCE); }
+
+	public static boolean[] buttons = new boolean[GLFW.GLFW_MOUSE_BUTTON_LAST];
+
+	@Override
+	public void invoke(long window, int button, int action, int mods)
+	{ buttons[button] = action != GLFW.GLFW_RELEASE; }
+}