src/main/java/mekanism/client/MekKeyHandler.java

package mekanism.client;

import net.minecraft.client.settings.KeyBinding;

import org.lwjgl.input.Keyboard;
import org.lwjgl.input.Mouse;

public abstract class MekKeyHandler
{
	public KeyBinding[] keyBindings;
	public boolean[] keyDown;
	public boolean[] repeatings;
	public boolean isDummy;

	/**
	 * Pass an array of keybindings and a repeat flag for each one
	 *
	 * @param bindings
	 * @param rep
	 */
	public MekKeyHandler(KeyBinding[] bindings, boolean[] rep)
	{
		assert keyBindings.length == repeatings.length : "You need to pass two arrays of identical length";
		keyBindings = bindings;
		repeatings = rep;
		keyDown = new boolean[keyBindings.length];
	}

	/**
	 * Register the keys into the system. You will do your own keyboard
	 * management elsewhere. No events will fire if you use this method
	 *
	 * @param  bindings
	 */
	public MekKeyHandler(KeyBinding[] bindings)
	{
		keyBindings = bindings;
		isDummy = true;
	}

	public static boolean getIsKeyPressed(KeyBinding keyBinding)
	{
		int keyCode = keyBinding.getKeyCode();
		return keyCode < 0 ? Mouse.isButtonDown(keyCode + 100) : Keyboard.isKeyDown(keyCode);
	}

	public KeyBinding[] getKeyBindings ()
	{
		return keyBindings;
	}

	public void keyTick()
	{
		for(int i = 0; i < keyBindings.length; i++)
		{
			KeyBinding keyBinding = keyBindings[i];
			boolean state = keyBinding.getIsKeyPressed();

			if(state != keyDown[i] || (state && repeatings[i]))
			{
				if(state)
				{
					keyDown(keyBinding, state == keyDown[i]);
				}
				else {
					keyUp(keyBinding);
				}
				
				keyDown[i] = state;
			}
		}
	}

	public abstract void keyDown(KeyBinding kb, boolean isRepeat);

	public abstract void keyUp(KeyBinding kb);
}