001    package net.minecraft.inventory;
002    
003    import net.minecraft.entity.player.EntityPlayer;
004    import net.minecraft.item.ItemStack;
005    import net.minecraft.tileentity.TileEntityDispenser;
006    
007    public class ContainerDispenser extends Container
008    {
009        private TileEntityDispenser tileEntityDispenser;
010    
011        public ContainerDispenser(IInventory par1IInventory, TileEntityDispenser par2TileEntityDispenser)
012        {
013            this.tileEntityDispenser = par2TileEntityDispenser;
014            int var3;
015            int var4;
016    
017            for (var3 = 0; var3 < 3; ++var3)
018            {
019                for (var4 = 0; var4 < 3; ++var4)
020                {
021                    this.addSlotToContainer(new Slot(par2TileEntityDispenser, var4 + var3 * 3, 62 + var4 * 18, 17 + var3 * 18));
022                }
023            }
024    
025            for (var3 = 0; var3 < 3; ++var3)
026            {
027                for (var4 = 0; var4 < 9; ++var4)
028                {
029                    this.addSlotToContainer(new Slot(par1IInventory, var4 + var3 * 9 + 9, 8 + var4 * 18, 84 + var3 * 18));
030                }
031            }
032    
033            for (var3 = 0; var3 < 9; ++var3)
034            {
035                this.addSlotToContainer(new Slot(par1IInventory, var3, 8 + var3 * 18, 142));
036            }
037        }
038    
039        public boolean canInteractWith(EntityPlayer par1EntityPlayer)
040        {
041            return this.tileEntityDispenser.isUseableByPlayer(par1EntityPlayer);
042        }
043    
044        /**
045         * Called when a player shift-clicks on a slot. You must override this or you will crash when someone does that.
046         */
047        public ItemStack transferStackInSlot(EntityPlayer par1EntityPlayer, int par2)
048        {
049            ItemStack var3 = null;
050            Slot var4 = (Slot)this.inventorySlots.get(par2);
051    
052            if (var4 != null && var4.getHasStack())
053            {
054                ItemStack var5 = var4.getStack();
055                var3 = var5.copy();
056    
057                if (par2 < 9)
058                {
059                    if (!this.mergeItemStack(var5, 9, 45, true))
060                    {
061                        return null;
062                    }
063                }
064                else if (!this.mergeItemStack(var5, 0, 9, false))
065                {
066                    return null;
067                }
068    
069                if (var5.stackSize == 0)
070                {
071                    var4.putStack((ItemStack)null);
072                }
073                else
074                {
075                    var4.onSlotChanged();
076                }
077    
078                if (var5.stackSize == var3.stackSize)
079                {
080                    return null;
081                }
082    
083                var4.onPickupFromSlot(par1EntityPlayer, var5);
084            }
085    
086            return var3;
087        }
088    }