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path: root/src/main/java/net/minecraft/server/BlockDispenser.java
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package net.minecraft.server;

import java.util.Random;

// CraftBukkit start
import org.bukkit.craftbukkit.inventory.CraftItemStack;
import org.bukkit.event.block.BlockDispenseEvent;
// CraftBukkit end

public class BlockDispenser extends BlockContainer {

    private Random a = new Random();

    protected BlockDispenser(int i) {
        super(i, Material.STONE);
        this.textureId = 45;
        this.a(CreativeModeTab.d);
    }

    public int p_() {
        return 4;
    }

    public int getDropType(int i, Random random, int j) {
        return Block.DISPENSER.id;
    }

    public void onPlace(World world, int i, int j, int k) {
        super.onPlace(world, i, j, k);
        this.l(world, i, j, k);
    }

    private void l(World world, int i, int j, int k) {
        if (!world.isStatic) {
            int l = world.getTypeId(i, j, k - 1);
            int i1 = world.getTypeId(i, j, k + 1);
            int j1 = world.getTypeId(i - 1, j, k);
            int k1 = world.getTypeId(i + 1, j, k);
            byte b0 = 3;

            if (Block.n[l] && !Block.n[i1]) {
                b0 = 3;
            }

            if (Block.n[i1] && !Block.n[l]) {
                b0 = 2;
            }

            if (Block.n[j1] && !Block.n[k1]) {
                b0 = 5;
            }

            if (Block.n[k1] && !Block.n[j1]) {
                b0 = 4;
            }

            world.setData(i, j, k, b0);
        }
    }

    public int a(int i) {
        return i == 1 ? this.textureId + 17 : (i == 0 ? this.textureId + 17 : (i == 3 ? this.textureId + 1 : this.textureId));
    }

    public boolean interact(World world, int i, int j, int k, EntityHuman entityhuman, int l, float f, float f1, float f2) {
        if (world.isStatic) {
            return true;
        } else {
            TileEntityDispenser tileentitydispenser = (TileEntityDispenser) world.getTileEntity(i, j, k);

            if (tileentitydispenser != null) {
                entityhuman.openDispenser(tileentitydispenser);
            }

            return true;
        }
    }

    // CraftBukkit - private to public
    public void dispense(World world, int i, int j, int k, Random random) {
        int l = world.getData(i, j, k);
        byte b0 = 0;
        byte b1 = 0;

        if (l == 3) {
            b1 = 1;
        } else if (l == 2) {
            b1 = -1;
        } else if (l == 5) {
            b0 = 1;
        } else {
            b0 = -1;
        }

        TileEntityDispenser tileentitydispenser = (TileEntityDispenser) world.getTileEntity(i, j, k);

        if (tileentitydispenser != null) {
            int i1 = tileentitydispenser.i();

            if (i1 < 0) {
                world.triggerEffect(1001, i, j, k, 0);
            } else {
                double d0 = (double) i + (double) b0 * 0.6D + 0.5D;
                double d1 = (double) j + 0.5D;
                double d2 = (double) k + (double) b1 * 0.6D + 0.5D;
                ItemStack itemstack = tileentitydispenser.getItem(i1);

                // CraftBukkit start
                // Clone item stack, then set the count to 1
                itemstack = itemstack.cloneItemStack();
                itemstack.count = 1;

                double d3 = random.nextDouble() * 0.1D + 0.2D;
                double motX = (double) b0 * d3;
                double motY = 0.20000000298023224D;
                double motZ = (double) b1 * d3;
                motX += random.nextGaussian() * 0.007499999832361937D * 6.0D;
                motY += random.nextGaussian() * 0.007499999832361937D * 6.0D;
                motZ += random.nextGaussian() * 0.007499999832361937D * 6.0D;

                org.bukkit.block.Block block = world.getWorld().getBlockAt(i, j, k);
                org.bukkit.inventory.ItemStack bukkitItem = new CraftItemStack(itemstack).clone();

                BlockDispenseEvent event = new BlockDispenseEvent(block, bukkitItem, new org.bukkit.util.Vector(motX, motY, motZ));
                world.getServer().getPluginManager().callEvent(event);

                if (event.isCancelled()) {
                    return;
                }

                itemstack = CraftItemStack.createNMSItemStack(event.getItem());
                // CraftBukkit end

                int j1 = a(tileentitydispenser, world, itemstack, random, i, j, k, b0, b1, d0, d1, d2);

                if (j1 == 1) {
                    // CraftBukkit start
                    if (event.getItem().equals(bukkitItem)) {
                        // Actually remove the item
                        tileentitydispenser.splitStack(i1, 1);
                    }
                    // CraftBukkit end
                } else if (j1 == 0) {
                    // CraftBukkit start
                    motX = event.getVelocity().getX();
                    motY = event.getVelocity().getY();
                    motZ = event.getVelocity().getZ();

                    if (event.getItem().equals(bukkitItem)) {
                        // Actually remove the item
                        tileentitydispenser.splitStack(i1, 1);
                    }

                    EntityItem entityitem = new EntityItem(world, d0, d1 - 0.3D, d2, itemstack);
                    entityitem.motX = event.getVelocity().getX();
                    entityitem.motY = event.getVelocity().getY();
                    entityitem.motZ = event.getVelocity().getZ();
                    world.addEntity(entityitem);
                    // CraftBukkit end

                    world.triggerEffect(1000, i, j, k, 0);
                // CraftBukkit start - new condition
                } else if (j1 == 2) {
                    ItemStack old = tileentitydispenser.getItem(i1);
                    if (old.id == Item.BUCKET.id && old.count > 1) {
                        old.count--;
                        if (tileentitydispenser.a(itemstack) < 0) {
                            a(world, itemstack, random, 6, l, i1, d0, d1, d2);
                        }
                    } else {
                        tileentitydispenser.setItem(i1, itemstack);
                    }
                    // CraftBukkit end
                }

                world.triggerEffect(2000, i, j, k, b0 + 1 + (b1 + 1) * 3);
            }
        }
    }

    public void doPhysics(World world, int i, int j, int k, int l) {
        if (l > 0 && Block.byId[l].isPowerSource()) {
            boolean flag = world.isBlockIndirectlyPowered(i, j, k) || world.isBlockIndirectlyPowered(i, j + 1, k);

            if (flag) {
                world.a(i, j, k, this.id, this.p_());
            }
        }
    }

    public void b(World world, int i, int j, int k, Random random) {
        if (!world.isStatic && (world.isBlockIndirectlyPowered(i, j, k) || world.isBlockIndirectlyPowered(i, j + 1, k))) {
            this.dispense(world, i, j, k, random);
        }
    }

    public TileEntity a(World world) {
        return new TileEntityDispenser();
    }

    public void postPlace(World world, int i, int j, int k, EntityLiving entityliving) {
        int l = MathHelper.floor((double) (entityliving.yaw * 4.0F / 360.0F) + 0.5D) & 3;

        if (l == 0) {
            world.setData(i, j, k, 2);
        }

        if (l == 1) {
            world.setData(i, j, k, 5);
        }

        if (l == 2) {
            world.setData(i, j, k, 3);
        }

        if (l == 3) {
            world.setData(i, j, k, 4);
        }
    }

    public void remove(World world, int i, int j, int k, int l, int i1) {
        TileEntityDispenser tileentitydispenser = (TileEntityDispenser) world.getTileEntity(i, j, k);

        if (tileentitydispenser != null) {
            for (int j1 = 0; j1 < tileentitydispenser.getSize(); ++j1) {
                ItemStack itemstack = tileentitydispenser.getItem(j1);

                if (itemstack != null) {
                    float f = this.a.nextFloat() * 0.8F + 0.1F;
                    float f1 = this.a.nextFloat() * 0.8F + 0.1F;
                    float f2 = this.a.nextFloat() * 0.8F + 0.1F;

                    while (itemstack.count > 0) {
                        int k1 = this.a.nextInt(21) + 10;

                        if (k1 > itemstack.count) {
                            k1 = itemstack.count;
                        }

                        itemstack.count -= k1;
                        EntityItem entityitem = new EntityItem(world, (double) ((float) i + f), (double) ((float) j + f1), (double) ((float) k + f2), new ItemStack(itemstack.id, k1, itemstack.getData()));

                        if (itemstack.hasTag()) {
                            entityitem.itemStack.setTag((NBTTagCompound) itemstack.getTag().clone());
                        }

                        float f3 = 0.05F;

                        entityitem.motX = (double) ((float) this.a.nextGaussian() * f3);
                        entityitem.motY = (double) ((float) this.a.nextGaussian() * f3 + 0.2F);
                        entityitem.motZ = (double) ((float) this.a.nextGaussian() * f3);
                        world.addEntity(entityitem);
                    }
                }
            }
        }

        super.remove(world, i, j, k, l, i1);
    }

    private static void a(World world, ItemStack itemstack, Random random, int i, int j, int k, double d0, double d1, double d2) {
        EntityItem entityitem = new EntityItem(world, d0, d1 - 0.3D, d2, itemstack);
        double d3 = random.nextDouble() * 0.1D + 0.2D;

        entityitem.motX = (double) j * d3;
        entityitem.motY = 0.20000000298023224D;
        entityitem.motZ = (double) k * d3;
        entityitem.motX += random.nextGaussian() * 0.007499999832361937D * (double) i;
        entityitem.motY += random.nextGaussian() * 0.007499999832361937D * (double) i;
        entityitem.motZ += random.nextGaussian() * 0.007499999832361937D * (double) i;
        world.addEntity(entityitem);
    }

    private static int a(TileEntityDispenser tileentitydispenser, World world, ItemStack itemstack, Random random, int i, int j, int k, int l, int i1, double d0, double d1, double d2) {
        float f = 1.1F;
        byte b0 = 6;

        if (itemstack.id == Item.ARROW.id) {
            EntityArrow entityarrow = new EntityArrow(world, d0, d1, d2);

            entityarrow.shoot((double) l, 0.10000000149011612D, (double) i1, f, (float) b0);
            entityarrow.fromPlayer = 1;
            world.addEntity(entityarrow);
            world.triggerEffect(1002, i, j, k, 0);
            return 1;
        } else if (itemstack.id == Item.EGG.id) {
            EntityEgg entityegg = new EntityEgg(world, d0, d1, d2);

            entityegg.c((double) l, 0.10000000149011612D, (double) i1, f, (float) b0);
            world.addEntity(entityegg);
            world.triggerEffect(1002, i, j, k, 0);
            return 1;
        } else if (itemstack.id == Item.SNOW_BALL.id) {
            EntitySnowball entitysnowball = new EntitySnowball(world, d0, d1, d2);

            entitysnowball.c((double) l, 0.10000000149011612D, (double) i1, f, (float) b0);
            world.addEntity(entitysnowball);
            world.triggerEffect(1002, i, j, k, 0);
            return 1;
        } else if (itemstack.id == Item.POTION.id && ItemPotion.g(itemstack.getData())) {
            EntityPotion entitypotion = new EntityPotion(world, d0, d1, d2, itemstack.getData());

            entitypotion.c((double) l, 0.10000000149011612D, (double) i1, f * 1.25F, (float) b0 * 0.5F);
            world.addEntity(entitypotion);
            world.triggerEffect(1002, i, j, k, 0);
            return 1;
        } else if (itemstack.id == Item.EXP_BOTTLE.id) {
            EntityThrownExpBottle entitythrownexpbottle = new EntityThrownExpBottle(world, d0, d1, d2);

            entitythrownexpbottle.c((double) l, 0.10000000149011612D, (double) i1, f * 1.25F, (float) b0 * 0.5F);
            world.addEntity(entitythrownexpbottle);
            world.triggerEffect(1002, i, j, k, 0);
            return 1;
        } else if (itemstack.id == Item.MONSTER_EGG.id) {
            ItemMonsterEgg.a(world, itemstack.getData(), d0 + (double) l * 0.3D, d1 - 0.3D, d2 + (double) i1 * 0.3D);
            world.triggerEffect(1002, i, j, k, 0);
            return 1;
        } else if (itemstack.id == Item.FIREBALL.id) {
            EntitySmallFireball entitysmallfireball = new EntitySmallFireball(world, d0 + (double) l * 0.3D, d1, d2 + (double) i1 * 0.3D, (double) l + random.nextGaussian() * 0.05D, random.nextGaussian() * 0.05D, (double) i1 + random.nextGaussian() * 0.05D);

            world.addEntity(entitysmallfireball);
            world.triggerEffect(1009, i, j, k, 0);
            return 1;
        } else if (itemstack.id != Item.LAVA_BUCKET.id && itemstack.id != Item.WATER_BUCKET.id) {
            if (itemstack.id == Item.BUCKET.id) {
                int j1 = i + l;
                int k1 = k + i1;
                Material material = world.getMaterial(j1, j, k1);
                int l1 = world.getData(j1, j, k1);

                if (material == Material.WATER && l1 == 0) {
                    world.setTypeId(j1, j, k1, 0);
                    if (--itemstack.count == 0) {
                        itemstack.id = Item.WATER_BUCKET.id;
                        itemstack.count = 1;
                    } else if (tileentitydispenser.a(new ItemStack(Item.WATER_BUCKET)) < 0) {
                        a(world, new ItemStack(Item.WATER_BUCKET), random, 6, l, i1, d0, d1, d2);
                    }

                    return 2;
                } else if (material == Material.LAVA && l1 == 0) {
                    world.setTypeId(j1, j, k1, 0);
                    if (--itemstack.count == 0) {
                        itemstack.id = Item.LAVA_BUCKET.id;
                        itemstack.count = 1;
                    } else if (tileentitydispenser.a(new ItemStack(Item.LAVA_BUCKET)) < 0) {
                        a(world, new ItemStack(Item.LAVA_BUCKET), random, 6, l, i1, d0, d1, d2);
                    }

                    return 2;
                } else {
                    return 0;
                }
            } else if (itemstack.getItem() instanceof ItemMinecart) {
                d0 = (double) i + (l < 0 ? (double) l * 0.8D : (double) ((float) l * 1.8F)) + (double) ((float) Math.abs(i1) * 0.5F);
                d2 = (double) k + (i1 < 0 ? (double) i1 * 0.8D : (double) ((float) i1 * 1.8F)) + (double) ((float) Math.abs(l) * 0.5F);
                if (BlockMinecartTrack.d_(world, i + l, j, k + i1)) {
                    d1 = (double) ((float) j + 0.5F);
                } else {
                    if (!world.isEmpty(i + l, j, k + i1) || !BlockMinecartTrack.d_(world, i + l, j - 1, k + i1)) {
                        return 0;
                    }

                    d1 = (double) ((float) j - 0.5F);
                }

                EntityMinecart entityminecart = new EntityMinecart(world, d0, d1, d2, ((ItemMinecart) itemstack.getItem()).a);

                world.addEntity(entityminecart);
                world.triggerEffect(1000, i, j, k, 0);
                return 1;
            } else if (itemstack.id == Item.BOAT.id) {
                d0 = (double) i + (l < 0 ? (double) l * 0.8D : (double) ((float) l * 1.8F)) + (double) ((float) Math.abs(i1) * 0.5F);
                d2 = (double) k + (i1 < 0 ? (double) i1 * 0.8D : (double) ((float) i1 * 1.8F)) + (double) ((float) Math.abs(l) * 0.5F);
                if (world.getMaterial(i + l, j, k + i1) == Material.WATER) {
                    d1 = (double) ((float) j + 1.0F);
                } else {
                    if (!world.isEmpty(i + l, j, k + i1) || world.getMaterial(i + l, j - 1, k + i1) != Material.WATER) {
                        return 0;
                    }

                    d1 = (double) j;
                }

                EntityBoat entityboat = new EntityBoat(world, d0, d1, d2);

                world.addEntity(entityboat);
                world.triggerEffect(1000, i, j, k, 0);
                return 1;
            } else {
                return 0;
            }
        } else {
            ItemBucket itembucket = (ItemBucket) itemstack.getItem();

            if (itembucket.a(world, (double) i, (double) j, (double) k, i + l, j, k + i1)) {
                itemstack.id = Item.BUCKET.id;
                itemstack.count = 1;
                return 2;
            } else {
                return 0;
            }
        }
    }
}