    001package net.minecraft.entity.item;
    002
    003import net.minecraft.entity.player.EntityPlayer;
    004import net.minecraft.inventory.Container;
    005import net.minecraft.inventory.IInventory;
    006import net.minecraft.item.ItemStack;
    007import net.minecraft.nbt.NBTTagCompound;
    008import net.minecraft.nbt.NBTTagList;
    009import net.minecraft.util.DamageSource;
    010import net.minecraft.world.World;
    011import net.minecraftforge.common.MinecraftForge;
    012import net.minecraftforge.event.entity.minecart.MinecartInteractEvent;
    013
    014public abstract class EntityMinecartContainer extends EntityMinecart implements IInventory
    015{
    016    private ItemStack[] minecartContainerItems = new ItemStack[36];
    017
    018    /**
    019     * When set to true, the minecart will drop all items when setDead() is called. When false (such as when travelling
    020     * dimensions) it preserves its contents.
    021     */
    022    private boolean dropContentsWhenDead = true;
    023
    024    public EntityMinecartContainer(World par1World)
    025    {
    026        super(par1World);
    027    }
    028
    029    public EntityMinecartContainer(World par1World, double par2, double par4, double par6)
    030    {
    031        super(par1World, par2, par4, par6);
    032    }
    033
    034    public void killMinecart(DamageSource par1DamageSource)
    035    {
    036        super.killMinecart(par1DamageSource);
    037
    038        for (int i = 0; i < this.getSizeInventory(); ++i)
    039        {
    040            ItemStack itemstack = this.getStackInSlot(i);
    041
    042            if (itemstack != null)
    043            {
    044                float f = this.rand.nextFloat() * 0.8F + 0.1F;
    045                float f1 = this.rand.nextFloat() * 0.8F + 0.1F;
    046                float f2 = this.rand.nextFloat() * 0.8F + 0.1F;
    047
    048                while (itemstack.stackSize > 0)
    049                {
    050                    int j = this.rand.nextInt(21) + 10;
    051
    052                    if (j > itemstack.stackSize)
    053                    {
    054                        j = itemstack.stackSize;
    055                    }
    056
    057                    itemstack.stackSize -= j;
    058                    EntityItem entityitem = new EntityItem(this.worldObj, this.posX + (double)f, this.posY + (double)f1, this.posZ + (double)f2, new ItemStack(itemstack.itemID, j, itemstack.getItemDamage()));
    059                    float f3 = 0.05F;
    060                    entityitem.motionX = (double)((float)this.rand.nextGaussian() * f3);
    061                    entityitem.motionY = (double)((float)this.rand.nextGaussian() * f3 + 0.2F);
    062                    entityitem.motionZ = (double)((float)this.rand.nextGaussian() * f3);
    063                    this.worldObj.spawnEntityInWorld(entityitem);
    064                }
    065            }
    066        }
    067    }
    068
    069    /**
    070     * Returns the stack in slot i
    071     */
    072    public ItemStack getStackInSlot(int par1)
    073    {
    074        return this.minecartContainerItems[par1];
    075    }
    076
    077    /**
    078     * Removes from an inventory slot (first arg) up to a specified number (second arg) of items and returns them in a
    079     * new stack.
    080     */
    081    public ItemStack decrStackSize(int par1, int par2)
    082    {
    083        if (this.minecartContainerItems[par1] != null)
    084        {
    085            ItemStack itemstack;
    086
    087            if (this.minecartContainerItems[par1].stackSize <= par2)
    088            {
    089                itemstack = this.minecartContainerItems[par1];
    090                this.minecartContainerItems[par1] = null;
    091                return itemstack;
    092            }
    093            else
    094            {
    095                itemstack = this.minecartContainerItems[par1].splitStack(par2);
    096
    097                if (this.minecartContainerItems[par1].stackSize == 0)
    098                {
    099                    this.minecartContainerItems[par1] = null;
    100                }
    101
    102                return itemstack;
    103            }
    104        }
    105        else
    106        {
    107            return null;
    108        }
    109    }
    110
    111    /**
    112     * When some containers are closed they call this on each slot, then drop whatever it returns as an EntityItem -
    113     * like when you close a workbench GUI.
    114     */
    115    public ItemStack getStackInSlotOnClosing(int par1)
    116    {
    117        if (this.minecartContainerItems[par1] != null)
    118        {
    119            ItemStack itemstack = this.minecartContainerItems[par1];
    120            this.minecartContainerItems[par1] = null;
    121            return itemstack;
    122        }
    123        else
    124        {
    125            return null;
    126        }
    127    }
    128
    129    /**
    130     * Sets the given item stack to the specified slot in the inventory (can be crafting or armor sections).
    131     */
    132    public void setInventorySlotContents(int par1, ItemStack par2ItemStack)
    133    {
    134        this.minecartContainerItems[par1] = par2ItemStack;
    135
    136        if (par2ItemStack != null && par2ItemStack.stackSize > this.getInventoryStackLimit())
    137        {
    138            par2ItemStack.stackSize = this.getInventoryStackLimit();
    139        }
    140    }
    141
    142    /**
    143     * Called when an the contents of an Inventory change, usually
    144     */
    145    public void onInventoryChanged() {}
    146
    147    /**
    148     * Do not make give this method the name canInteractWith because it clashes with Container
    149     */
    150    public boolean isUseableByPlayer(EntityPlayer par1EntityPlayer)
    151    {
    152        return this.isDead ? false : par1EntityPlayer.getDistanceSqToEntity(this) <= 64.0D;
    153    }
    154
    155    public void openChest() {}
    156
    157    public void closeChest() {}
    158
    159    /**
    160     * Returns true if automation is allowed to insert the given stack (ignoring stack size) into the given slot.
    161     */
    162    public boolean isStackValidForSlot(int par1, ItemStack par2ItemStack)
    163    {
    164        return true;
    165    }
    166
    167    /**
    168     * Returns the name of the inventory.
    169     */
    170    public String getInvName()
    171    {
    172        return this.isInvNameLocalized() ? this.func_95999_t() : "container.minecart";
    173    }
    174
    175    /**
    176     * Returns the maximum stack size for a inventory slot. Seems to always be 64, possibly will be extended. *Isn't
    177     * this more of a set than a get?*
    178     */
    179    public int getInventoryStackLimit()
    180    {
    181        return 64;
    182    }
    183
    184    /**
    185     * Teleports the entity to another dimension. Params: Dimension number to teleport to
    186     */
    187    public void travelToDimension(int par1)
    188    {
    189        this.dropContentsWhenDead = false;
    190        super.travelToDimension(par1);
    191    }
    192
    193    /**
    194     * Will get destroyed next tick.
    195     */
    196    public void setDead()
    197    {
    198        if (this.dropContentsWhenDead)
    199        {
    200            for (int i = 0; i < this.getSizeInventory(); ++i)
    201            {
    202                ItemStack itemstack = this.getStackInSlot(i);
    203
    204                if (itemstack != null)
    205                {
    206                    float f = this.rand.nextFloat() * 0.8F + 0.1F;
    207                    float f1 = this.rand.nextFloat() * 0.8F + 0.1F;
    208                    float f2 = this.rand.nextFloat() * 0.8F + 0.1F;
    209
    210                    while (itemstack.stackSize > 0)
    211                    {
    212                        int j = this.rand.nextInt(21) + 10;
    213
    214                        if (j > itemstack.stackSize)
    215                        {
    216                            j = itemstack.stackSize;
    217                        }
    218
    219                        itemstack.stackSize -= j;
    220                        EntityItem entityitem = new EntityItem(this.worldObj, this.posX + (double)f, this.posY + (double)f1, this.posZ + (double)f2, new ItemStack(itemstack.itemID, j, itemstack.getItemDamage()));
    221
    222                        if (itemstack.hasTagCompound())
    223                        {
    224                            entityitem.getEntityItem().setTagCompound((NBTTagCompound)itemstack.getTagCompound().copy());
    225                        }
    226
    227                        float f3 = 0.05F;
    228                        entityitem.motionX = (double)((float)this.rand.nextGaussian() * f3);
    229                        entityitem.motionY = (double)((float)this.rand.nextGaussian() * f3 + 0.2F);
    230                        entityitem.motionZ = (double)((float)this.rand.nextGaussian() * f3);
    231                        this.worldObj.spawnEntityInWorld(entityitem);
    232                    }
    233                }
    234            }
    235        }
    236
    237        super.setDead();
    238    }
    239
    240    /**
    241     * (abstract) Protected helper method to write subclass entity data to NBT.
    242     */
    243    protected void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
    244    {
    245        super.writeEntityToNBT(par1NBTTagCompound);
    246        NBTTagList nbttaglist = new NBTTagList();
    247
    248        for (int i = 0; i < this.minecartContainerItems.length; ++i)
    249        {
    250            if (this.minecartContainerItems[i] != null)
    251            {
    252                NBTTagCompound nbttagcompound1 = new NBTTagCompound();
    253                nbttagcompound1.setByte("Slot", (byte)i);
    254                this.minecartContainerItems[i].writeToNBT(nbttagcompound1);
    255                nbttaglist.appendTag(nbttagcompound1);
    256            }
    257        }
    258
    259        par1NBTTagCompound.setTag("Items", nbttaglist);
    260    }
    261
    262    /**
    263     * (abstract) Protected helper method to read subclass entity data from NBT.
    264     */
    265    protected void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
    266    {
    267        super.readEntityFromNBT(par1NBTTagCompound);
    268        NBTTagList nbttaglist = par1NBTTagCompound.getTagList("Items");
    269        this.minecartContainerItems = new ItemStack[this.getSizeInventory()];
    270
    271        for (int i = 0; i < nbttaglist.tagCount(); ++i)
    272        {
    273            NBTTagCompound nbttagcompound1 = (NBTTagCompound)nbttaglist.tagAt(i);
    274            int j = nbttagcompound1.getByte("Slot") & 255;
    275
    276            if (j >= 0 && j < this.minecartContainerItems.length)
    277            {
    278                this.minecartContainerItems[j] = ItemStack.loadItemStackFromNBT(nbttagcompound1);
    279            }
    280        }
    281    }
    282
    283    /**
    284     * Called when a player interacts with a mob. e.g. gets milk from a cow, gets into the saddle on a pig.
    285     */
    286    public boolean interact(EntityPlayer par1EntityPlayer)
    287    {
    288        if(MinecraftForge.EVENT_BUS.post(new MinecartInteractEvent(this, par1EntityPlayer)))
    289        {
    290            return true;
    291        }
    292        if (!this.worldObj.isRemote)
    293        {
    294            par1EntityPlayer.displayGUIChest(this);
    295        }
    296
    297        return true;
    298    }
    299
    300    protected void applyDrag()
    301    {
    302        int i = 15 - Container.func_94526_b(this);
    303        float f = 0.98F + (float)i * 0.001F;
    304        this.motionX *= (double)f;
    305        this.motionY *= 0.0D;
    306        this.motionZ *= (double)f;
    307    }
    308}