ContainerChest.java

package net.minecraft.src;

public class ContainerChest extends Container {
	private IInventory lowerChestInventory;
	private int numRows;

	public ContainerChest(IInventory par1IInventory, IInventory par2IInventory) {
		this.lowerChestInventory = par2IInventory;
		this.numRows = par2IInventory.getSizeInventory() / 9;
		par2IInventory.openChest();
		int var3 = (this.numRows - 4) * 18;
		int var4;
		int var5;

		for (var4 = 0; var4 < this.numRows; ++var4) {
			for (var5 = 0; var5 < 9; ++var5) {
				this.addSlotToContainer(new Slot(par2IInventory, var5 + var4 * 9, 8 + var5 * 18, 18 + var4 * 18));
			}
		}

		for (var4 = 0; var4 < 3; ++var4) {
			for (var5 = 0; var5 < 9; ++var5) {
				this.addSlotToContainer(new Slot(par1IInventory, var5 + var4 * 9 + 9, 8 + var5 * 18, 103 + var4 * 18 + var3));
			}
		}

		for (var4 = 0; var4 < 9; ++var4) {
			this.addSlotToContainer(new Slot(par1IInventory, var4, 8 + var4 * 18, 161 + var3));
		}
	}

	// Spout Start - Chest sorting
	public IInventory getIInventory() {
		return lowerChestInventory;
	}

	@Override
	public boolean isSortableInventory() {
		return true;
	}
	// Spout End

	public boolean canInteractWith(EntityPlayer par1EntityPlayer) {
		return this.lowerChestInventory.isUseableByPlayer(par1EntityPlayer);
	}

	/**
	 * Called when a player shift-clicks on a slot. You must override this or you will crash when someone does that.
	 */
	public ItemStack transferStackInSlot(EntityPlayer par1EntityPlayer, int par2) {
		ItemStack var3 = null;
		Slot var4 = (Slot)this.inventorySlots.get(par2);

		if (var4 != null && var4.getHasStack()) {
			ItemStack var5 = var4.getStack();
			var3 = var5.copy();

			if (par2 < this.numRows * 9) {
				if (!this.mergeItemStack(var5, this.numRows * 9, this.inventorySlots.size(), true)) {
					return null;
				}
			} else if (!this.mergeItemStack(var5, 0, this.numRows * 9, false)) {
				return null;
			}

			if (var5.stackSize == 0) {
				var4.putStack((ItemStack)null);
			} else {
				var4.onSlotChanged();
			}
		}

		return var3;
	}

	/**
	 * Called when the container is closed.
	 */
	public void onContainerClosed(EntityPlayer par1EntityPlayer) {
		super.onContainerClosed(par1EntityPlayer);
		this.lowerChestInventory.closeChest();
	}
	
	/**
	 * Return this chest container's lower chest inventory.
	 */
	public IInventory getLowerChestInventory() {
		return this.lowerChestInventory;
	}
}