Chisel/src/main/java/com/cricketcraft/chisel/inventory/ContainerChisel.java

package com.cricketcraft.chisel.inventory;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.Slot;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;

import com.cricketcraft.chisel.carving.Carving;
import com.cricketcraft.chisel.item.ItemChisel;
import com.cricketcraft.chisel.utils.General;

public class ContainerChisel extends Container
{
    public final InventoryChiselSelection inventory;
    public InventoryPlayer playerInventory;
    int currentIndex;
    public ItemStack chisel;
    public boolean finished;
    public Carving carving;

    public ContainerChisel(InventoryPlayer inventoryplayer, InventoryChiselSelection inv)
    {
        inventory = inv;
        playerInventory = inventoryplayer;
        currentIndex = playerInventory.currentItem;
        inv.container = this;

        int[] leftOffsets = {8, 26, 134, 152, 44, 116};
        int[] topOffsets = {8, 26, 44, 62};

        for(int i = 0; i < 2; i++)
        {
            for(int y = 0; y < 4; y++)
            {
                for(int x = 0; x < 2; x++)
                {
                    addSlotToContainer(new SlotChiselSelection(this, inventory, inventory, x + i * 8 + y * 2, leftOffsets[x + i * 2], topOffsets[y]));
                }
            }
        }

        for(int y = 0; y < 4; y++)
        {
            for(int x = 0; x < 2; x++)
            {
                addSlotToContainer(new SlotChiselSelection(this, inventory, inventory, 16 + x + y * 2, leftOffsets[4 + x], topOffsets[3 - y]));
            }
        }

        addSlotToContainer(new SlotChiselInput(this, inventory, InventoryChiselSelection.normalSlots, 80, 35));

        for(int k = 0; k < 3; k++)
        {
            for(int j1 = 0; j1 < 9; j1++)
            {
                addSlotToContainer(new Slot(inventoryplayer, j1 + k * 9 + 9, 8 + j1 * 18, 102 + k * 18 - 18));
            }
        }

        for(int l = 0; l < 9; l++)
        {
            addSlotToContainer(l == currentIndex ?
                            new SlotChiselPlayer(this, inventoryplayer, l, 8 + l * 18, 160 - 18) :
                            new Slot(inventoryplayer, l, 8 + l * 18, 160 - 18)
            );
        }

        chisel = inventoryplayer.getCurrentItem();
        if(chisel.stackTagCompound != null)
        {
            ItemStack stack = ItemStack.loadItemStackFromNBT(chisel.stackTagCompound.getCompoundTag("chiselTarget"));
            inventory.setInventorySlotContents(InventoryChiselSelection.normalSlots, stack);
        }

        Item item = General.getItem(chisel);
        carving = item instanceof ItemChisel ? ((ItemChisel) item).carving : Carving.chisel;

        inventory.updateItems();
    }

    @Override
    public ItemStack slotClick(int par1, int par2, int par3, EntityPlayer par4EntityPlayer)
    {
        if(par3 == 2 && par2 == currentIndex)
            return null;

        return super.slotClick(par1, par2, par3, par4EntityPlayer);
    }

    @Override
    public void onContainerClosed(EntityPlayer entityplayer)
    {
        inventory.clearItems();
        super.onContainerClosed(entityplayer);
    }

    @Override
    public boolean canInteractWith(EntityPlayer entityplayer)
    {
        return inventory.isUseableByPlayer(entityplayer);
    }

    @Override
    public ItemStack transferStackInSlot(EntityPlayer entity, int i)
    {
        return null;
    }

    public void onChiselSlotChanged()
    {
        ItemStack stack = playerInventory.mainInventory[currentIndex];
        if(!stack.isItemEqual(chisel)) finished = true;

        if(finished) return;

        if(chisel.stackTagCompound == null)
            chisel.stackTagCompound = new NBTTagCompound();

        NBTTagCompound tag = new NBTTagCompound();
        if(inventory.getStackInSpecialSlot() != null)
            inventory.getStackInSpecialSlot().writeToNBT(tag);

        chisel.stackTagCompound.setTag("chiselTarget", tag);
        playerInventory.mainInventory[currentIndex] = chisel;
    }
}