src/main/java/moe/nea/firmament/mixins/ScreenChangeEventPatch.java


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package moe.nea.firmament.mixins;

import com.llamalad7.mixinextras.sugar.Local;
import com.llamalad7.mixinextras.sugar.ref.LocalRef;
import moe.nea.firmament.events.ScreenChangeEvent;
import net.minecraft.client.MinecraftClient;
import net.minecraft.client.gui.screen.Screen;
import org.jetbrains.annotations.Nullable;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.Shadow;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;

@Mixin(MinecraftClient.class)
public abstract class ScreenChangeEventPatch {
    @Shadow
    @Nullable
    public Screen currentScreen;

    @Inject(method = "setScreen", at = @At("HEAD"), cancellable = true)
    public void onScreenChange(Screen screen, CallbackInfo ci, @Local(argsOnly = true) LocalRef<Screen> screenLocalRef) {
        var event = new ScreenChangeEvent(currentScreen, screen);
        if (ScreenChangeEvent.Companion.publish(event).getCancelled()) {
            ci.cancel();
        } else if (event.getOverrideScreen() != null) {
            screenLocalRef.set(event.getOverrideScreen());
        }
    }
}