001    package net.minecraft.inventory;
002    
003    import net.minecraft.entity.player.EntityPlayer;
004    import net.minecraft.item.ItemStack;
005    
006    public class ContainerChest extends Container
007    {
008        private IInventory lowerChestInventory;
009        private int numRows;
010    
011        public ContainerChest(IInventory par1IInventory, IInventory par2IInventory)
012        {
013            this.lowerChestInventory = par2IInventory;
014            this.numRows = par2IInventory.getSizeInventory() / 9;
015            par2IInventory.openChest();
016            int var3 = (this.numRows - 4) * 18;
017            int var4;
018            int var5;
019    
020            for (var4 = 0; var4 < this.numRows; ++var4)
021            {
022                for (var5 = 0; var5 < 9; ++var5)
023                {
024                    this.addSlotToContainer(new Slot(par2IInventory, var5 + var4 * 9, 8 + var5 * 18, 18 + var4 * 18));
025                }
026            }
027    
028            for (var4 = 0; var4 < 3; ++var4)
029            {
030                for (var5 = 0; var5 < 9; ++var5)
031                {
032                    this.addSlotToContainer(new Slot(par1IInventory, var5 + var4 * 9 + 9, 8 + var5 * 18, 103 + var4 * 18 + var3));
033                }
034            }
035    
036            for (var4 = 0; var4 < 9; ++var4)
037            {
038                this.addSlotToContainer(new Slot(par1IInventory, var4, 8 + var4 * 18, 161 + var3));
039            }
040        }
041    
042        public boolean canInteractWith(EntityPlayer par1EntityPlayer)
043        {
044            return this.lowerChestInventory.isUseableByPlayer(par1EntityPlayer);
045        }
046    
047        /**
048         * Called when a player shift-clicks on a slot. You must override this or you will crash when someone does that.
049         */
050        public ItemStack transferStackInSlot(EntityPlayer par1EntityPlayer, int par2)
051        {
052            ItemStack var3 = null;
053            Slot var4 = (Slot)this.inventorySlots.get(par2);
054    
055            if (var4 != null && var4.getHasStack())
056            {
057                ItemStack var5 = var4.getStack();
058                var3 = var5.copy();
059    
060                if (par2 < this.numRows * 9)
061                {
062                    if (!this.mergeItemStack(var5, this.numRows * 9, this.inventorySlots.size(), true))
063                    {
064                        return null;
065                    }
066                }
067                else if (!this.mergeItemStack(var5, 0, this.numRows * 9, false))
068                {
069                    return null;
070                }
071    
072                if (var5.stackSize == 0)
073                {
074                    var4.putStack((ItemStack)null);
075                }
076                else
077                {
078                    var4.onSlotChanged();
079                }
080            }
081    
082            return var3;
083        }
084    
085        /**
086         * Callback for when the crafting gui is closed.
087         */
088        public void onCraftGuiClosed(EntityPlayer par1EntityPlayer)
089        {
090            super.onCraftGuiClosed(par1EntityPlayer);
091            this.lowerChestInventory.closeChest();
092        }
093    
094        /**
095         * Return this chest container's lower chest inventory.
096         */
097        public IInventory getLowerChestInventory()
098        {
099            return this.lowerChestInventory;
100        }
101    }