KeyInputHandler.java

package com.mattsmeets.macrokey.handler.hook;

import com.mattsmeets.macrokey.config.ModState;
import com.mattsmeets.macrokey.event.MacroActivationEvent;
import com.mattsmeets.macrokey.model.MacroInterface;
import com.mattsmeets.macrokey.repository.BindingsRepository;
import net.minecraftforge.client.event.InputEvent;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.eventbus.api.EventPriority;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import org.lwjgl.glfw.GLFW;

import java.io.IOException;
import java.util.HashSet;
import java.util.Set;

public class KeyInputHandler {

    private final BindingsRepository bindingsRepository;
    private final ModState modState;
    // private stash of pressed keys
    private final Set<Integer> pressedKeys;

    public KeyInputHandler(final BindingsRepository bindingsRepository, final ModState modState) {
        this.bindingsRepository = bindingsRepository;
        this.modState = modState;
        this.pressedKeys = new HashSet<>();
    }

    @SubscribeEvent(priority = EventPriority.NORMAL, receiveCanceled = true)
    public void onKeyInputEvent(InputEvent event) throws IOException {
        int keyCode = -1;
        boolean keyIsDown = false;
        int interfaceType = 0;
        int modifier = 0;
        if(!(event instanceof InputEvent.KeyInputEvent || event instanceof InputEvent.RawMouseEvent)) {
            return;
        }
        if(event instanceof InputEvent.KeyInputEvent) {
            keyCode = ((InputEvent.KeyInputEvent) event).getKey();
            keyIsDown = ((InputEvent.KeyInputEvent) event).getAction() == GLFW.GLFW_PRESS;
            modifier = ((InputEvent.KeyInputEvent) event).getModifiers();
        } else {
            keyCode = ((InputEvent.RawMouseEvent) event).getButton();
            keyIsDown = ((InputEvent.RawMouseEvent) event).getAction() == GLFW.GLFW_PRESS;
            modifier = ((InputEvent.RawMouseEvent) event).getMods();
            interfaceType = 1;
        }

        final Set<MacroInterface> macroList = bindingsRepository.findMacroByKeyCode(keyCode, interfaceType, modifier, modState.getActiveLayer(), false);
        if (macroList.isEmpty()) {
            return;
        }

        if (keyIsDown && !this.pressedKeys.contains(keyCode)) {
            /*
             * if the key has not been pressed during last events, send
             * an event, and add it to the current index of pressed keys
             */
            MinecraftForge.EVENT_BUS.post(new MacroActivationEvent.MacroActivationPressEvent(macroList));

            this.pressedKeys.add(keyCode);
        } else if (!keyIsDown && this.pressedKeys.contains(keyCode)) {
            /*
             * if the key has been pressed during last events, send
             * an event, and remove it from the current index of pressed keys
             */
            MinecraftForge.EVENT_BUS.post(new MacroActivationEvent.MacroActivationReleaseEvent(macroList));

            this.pressedKeys.remove(keyCode);
        }
    }
}