Weird code...

gistfile1.java

package net.minecraft.client.gui.inventory;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.client.resources.I18n;
import net.minecraft.inventory.ContainerChest;
import net.minecraft.inventory.IInventory;
import net.minecraft.util.ResourceLocation;
import org.lwjgl.opengl.GL11;

@SideOnly(Side.CLIENT)
public class GuiChest extends GuiContainer
{
    private static final ResourceLocation field_110421_t = new ResourceLocation("textures/gui/container/generic_54.png");
    private IInventory upperChestInventory;
    private IInventory lowerChestInventory;

    /**
     * window height is calculated with this values, the more rows, the heigher
     */
    private int inventoryRows;

    public GuiChest(IInventory par1IInventory, IInventory par2IInventory)
    {
        super(new ContainerChest(par1IInventory, par2IInventory));
        this.upperChestInventory = par1IInventory;
        this.lowerChestInventory = par2IInventory;
        this.allowUserInput = false;
        short short1 = 222;
        int i = short1 - 108;
        this.inventoryRows = par2IInventory.getSizeInventory() / 9;
        this.ySize = i + this.inventoryRows * 18;
    }

    /**
     * Draw the foreground layer for the GuiContainer (everything in front of the items)
     */
    protected void drawGuiContainerForegroundLayer(int par1, int par2)
    {
        this.fontRenderer.drawString(this.lowerChestInventory.isInvNameLocalized() ? this.lowerChestInventory.getInvName() : I18n.getString(this.lowerChestInventory.getInvName()), 8, 6, 4210752);
        this.fontRenderer.drawString(this.upperChestInventory.isInvNameLocalized() ? this.upperChestInventory.getInvName() : I18n.getString(this.upperChestInventory.getInvName()), 8, this.ySize - 96 + 2, 4210752);
    }

    /**
     * Draw the background layer for the GuiContainer (everything behind the items)
     */
    protected void drawGuiContainerBackgroundLayer(float par1, int par2, int par3)
    {
        GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
        this.mc.getTextureManager().bindTexture(field_110421_t);
        int k = (this.width - this.xSize) / 2;
        int l = (this.height - this.ySize) / 2;
        this.drawTexturedModalRect(k, l, 0, 0, this.xSize, this.inventoryRows * 18 + 17);
        this.drawTexturedModalRect(k, l + this.inventoryRows * 18 + 17, 0, 126, this.xSize, 96);
    }
}