left clicking mermaids gems in the gui onto something else tries to completely fill that target stack

Author: DaFuqs

src/main/java/de/dafuqs/spectrum/blocks/conditional/MermaidsGemItem.java

@@ -24,6 +24,7 @@
 public class MermaidsGemItem extends ItemNameBlockItem implements RevelationAware {
 
 	public static final ResourceLocation UNLOCK_IDENTIFIER = SpectrumCommon.locate("place_pedestal");
+	public static final int ITEM_INTERACTION_WATER_FILL_MILLIBUCKETS = 1000;
 
 	public MermaidsGemItem(Block block, Properties settings) {
 		super(block, settings);
@@ -63,20 +64,28 @@ public InteractionResult useOn(UseOnContext context) {
 
 	@Override
 	public boolean overrideStackedOnOther(@NotNull ItemStack gemStack, @NotNull Slot slot, @NotNull ClickAction clickType, @NotNull Player player) {
-		if (clickType != ClickAction.SECONDARY) {
-			return false;
-		}
+
 
 		ItemStack slotStack = slot.getItem();
 		IFluidHandlerItem fluidHandler = slotStack.getCapability(Capabilities.FluidHandler.ITEM);
 		if (fluidHandler != null) {
-			if(fluidHandler.fill(new FluidStack(Fluids.WATER, 1000), IFluidHandler.FluidAction.EXECUTE) > 0) {
+			
+			int maxUsedMermaidsGems = 1; // single item when right-clicking
+			if (clickType == ClickAction.PRIMARY) {
+				// whole stack when left-clicking
+				maxUsedMermaidsGems = gemStack.getCount();
+			}
+			
+			int maxFluidAmount = ITEM_INTERACTION_WATER_FILL_MILLIBUCKETS * maxUsedMermaidsGems;
+			int filledAmount = fluidHandler.fill(new FluidStack(Fluids.WATER, maxFluidAmount), IFluidHandler.FluidAction.EXECUTE);
+			if(filledAmount > 0) {
 				slot.set(fluidHandler.getContainer());
-				gemStack.shrink(1);
+				gemStack.shrink((int) Math.ceil((float) filledAmount / ITEM_INTERACTION_WATER_FILL_MILLIBUCKETS));
+				return true;
 			}
 		}
 
-		return true;
+		return false;
 	}
 
 }