Add EntityEquipment API. Adds BUKKIT-3103

Adds:
- Getting/Setting equipment
- getting/setting drop rates
- getting/setting ability to pick up items
-- As an added feature, players with this flag start off with a canceled PlayerPickupItemEvent

By: feildmaster <admin@feildmaster.com>

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java

@@ -28,6 +28,7 @@ import org.bukkit.craftbukkit.inventory.CraftInventoryPlayer;
 import org.bukkit.craftbukkit.inventory.CraftInventoryView;
 import org.bukkit.craftbukkit.inventory.CraftItemStack;
 import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.inventory.EntityEquipment;
 import org.bukkit.permissions.PermissibleBase;
 import org.bukkit.permissions.Permission;
 import org.bukkit.permissions.PermissionAttachment;
@@ -56,6 +57,10 @@ public class CraftHumanEntity extends CraftLivingEntity implements HumanEntity {
         return inventory;
     }
 
+    public EntityEquipment getEquipment() {
+        return inventory;
+    }
+
     public Inventory getEnderChest() {
         return enderChest;
     }

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java

@@ -27,6 +27,7 @@ import org.bukkit.Location;
 import org.bukkit.block.Block;
 import org.bukkit.craftbukkit.CraftServer;
 import org.bukkit.craftbukkit.CraftWorld;
+import org.bukkit.craftbukkit.inventory.CraftEntityEquipment;
 import org.bukkit.entity.Arrow;
 import org.bukkit.entity.Egg;
 import org.bukkit.entity.Entity;
@@ -40,14 +41,21 @@ import org.bukkit.entity.Projectile;
 import org.bukkit.entity.SmallFireball;
 import org.bukkit.entity.Snowball;
 import org.bukkit.entity.WitherSkull;
+import org.bukkit.inventory.EntityEquipment;
 import org.bukkit.potion.PotionEffect;
 import org.bukkit.potion.PotionEffectType;
 import org.bukkit.util.BlockIterator;
 import org.bukkit.util.Vector;
 
 public class CraftLivingEntity extends CraftEntity implements LivingEntity {
+    private CraftEntityEquipment equipment;
+
     public CraftLivingEntity(final CraftServer server, final EntityLiving entity) {
         super(server, entity);
+
+        if (!(this instanceof HumanEntity)) {
+            equipment = new CraftEntityEquipment(this);
+        }
     }
 
     public int getHealth() {
@@ -312,4 +320,16 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
     public void setRemoveWhenFarAway(boolean remove) {
         getHandle().persistent = !remove;
     }
+
+    public EntityEquipment getEquipment() {
+        return equipment;
+    }
+
+    public void setCanPickupItems(boolean pickup) {
+        getHandle().canPickUpLoot = pickup;
+    }
+
+    public boolean canPickupItems() {
+        return getHandle().canPickUpLoot;
+    }
 }

paper-server/src/main/java/org/bukkit/craftbukkit/inventory/CraftEntityEquipment.java

@@ -0,0 +1,142 @@
+package org.bukkit.craftbukkit.inventory;
+
+import org.bukkit.craftbukkit.entity.CraftLivingEntity;
+import org.bukkit.entity.Entity;
+import org.bukkit.inventory.EntityEquipment;
+import org.bukkit.inventory.ItemStack;
+
+public class CraftEntityEquipment implements EntityEquipment {
+    private static final int WEAPON_SLOT = 0;
+    private static final int HELMET_SLOT = 1;
+    private static final int CHEST_SLOT = 2;
+    private static final int LEG_SLOT = 3;
+    private static final int BOOT_SLOT = 4;
+    private static final int INVENTORY_SLOTS = 5;
+
+    private final CraftLivingEntity entity;
+
+    public CraftEntityEquipment(CraftLivingEntity entity) {
+        this.entity = entity;
+    }
+
+    public ItemStack getItemInHand() {
+        return getEquipment(WEAPON_SLOT);
+    }
+
+    public void setItemInHand(ItemStack stack) {
+        setEquipment(WEAPON_SLOT, stack);
+    }
+
+    public ItemStack getHelmet() {
+        return getEquipment(HELMET_SLOT);
+    }
+
+    public void setHelmet(ItemStack helmet) {
+        setEquipment(HELMET_SLOT, helmet);
+    }
+
+    public ItemStack getChestplate() {
+        return getEquipment(CHEST_SLOT);
+    }
+
+    public void setChestplate(ItemStack chestplate) {
+        setEquipment(CHEST_SLOT, chestplate);
+    }
+
+    public ItemStack getLeggings() {
+        return getEquipment(LEG_SLOT);
+    }
+
+    public void setLeggings(ItemStack leggings) {
+        setEquipment(LEG_SLOT, leggings);
+    }
+
+    public ItemStack getBoots() {
+        return getEquipment(BOOT_SLOT);
+    }
+
+    public void setBoots(ItemStack boots) {
+        setEquipment(BOOT_SLOT, boots);
+    }
+
+    public ItemStack[] getArmorContents() {
+        ItemStack[] armor = new ItemStack[INVENTORY_SLOTS - 1];
+        for(int slot = HELMET_SLOT; slot < INVENTORY_SLOTS; slot++) {
+            armor[slot - 1] = getEquipment(slot);
+        }
+        return armor;
+    }
+
+    public void setArmorContents(ItemStack[] items) {
+        for(int slot = HELMET_SLOT; slot < INVENTORY_SLOTS; slot++) {
+            ItemStack equipment = items != null && slot <= items.length ? items[slot - 1] : null;
+            setEquipment(slot, equipment);
+        }
+    }
+
+    private ItemStack getEquipment(int slot) {
+        return CraftItemStack.asBukkitStack(entity.getHandle().getEquipment(slot));
+    }
+
+    private void setEquipment(int slot, ItemStack stack) {
+        entity.getHandle().setEquipment(slot, CraftItemStack.createNMSItemStack(stack));
+    }
+
+    public void clear() {
+        for(int i = 0; i < INVENTORY_SLOTS; i++) {
+            setEquipment(i, null);
+        }
+    }
+
+    public Entity getHolder() {
+        return entity;
+    }
+
+    public float getItemInHandDropChance() {
+       return getDropChance(WEAPON_SLOT);
+    }
+
+    public void setItemInHandDropChance(float chance) {
+        setDropChance(WEAPON_SLOT, chance);
+    }
+
+    public float getHelmetDropChance() {
+        return getDropChance(HELMET_SLOT);
+    }
+
+    public void setHelmetDropChance(float chance) {
+        setDropChance(HELMET_SLOT, chance);
+    }
+
+    public float getChestPlateDropChance() {
+        return getDropChance(CHEST_SLOT);
+    }
+
+    public void setChestPlateDropChance(float chance) {
+        setDropChance(CHEST_SLOT, chance);
+    }
+
+    public float getLeggingsDropChance() {
+        return getDropChance(LEG_SLOT);
+    }
+
+    public void setLeggingsDropChance(float chance) {
+        setDropChance(LEG_SLOT, chance);
+    }
+
+    public float getBootsDropChance() {
+        return getDropChance(BOOT_SLOT);
+    }
+
+    public void setBootsDropChance(float chance) {
+        setDropChance(BOOT_SLOT, chance);
+    }
+
+    private void setDropChance(int slot, float chance) {
+        entity.getHandle().dropChances[slot] = chance - 0.1F;
+    }
+
+    private float getDropChance(int slot) {
+        return entity.getHandle().dropChances[slot] + 0.1F;
+    }
+}

paper-server/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryPlayer.java

@@ -3,9 +3,10 @@ package org.bukkit.craftbukkit.inventory;
 import net.minecraft.server.PlayerInventory;
 
 import org.bukkit.entity.HumanEntity;
+import org.bukkit.inventory.EntityEquipment;
 import org.bukkit.inventory.ItemStack;
 
-public class CraftInventoryPlayer extends CraftInventory implements org.bukkit.inventory.PlayerInventory {
+public class CraftInventoryPlayer extends CraftInventory implements org.bukkit.inventory.PlayerInventory, EntityEquipment {
     public CraftInventoryPlayer(net.minecraft.server.PlayerInventory inventory) {
         super(inventory);
     }
@@ -120,4 +121,44 @@ public class CraftInventoryPlayer extends CraftInventory implements org.bukkit.i
     public HumanEntity getHolder() {
         return (HumanEntity) inventory.getOwner();
     }
+
+    public float getItemInHandDropChance() {
+        return 1;
+    }
+
+    public void setItemInHandDropChance(float chance) {
+        throw new UnsupportedOperationException();
+    }
+
+    public float getHelmetDropChance() {
+        return 1;
+    }
+
+    public void setHelmetDropChance(float chance) {
+        throw new UnsupportedOperationException();
+    }
+
+    public float getChestPlateDropChance() {
+        return 1;
+    }
+
+    public void setChestPlateDropChance(float chance) {
+        throw new UnsupportedOperationException();
+    }
+
+    public float getLeggingsDropChance() {
+        return 1;
+    }
+
+    public void setLeggingsDropChance(float chance) {
+        throw new UnsupportedOperationException();
+    }
+
+    public float getBootsDropChance() {
+        return 1;
+    }
+
+    public void setBootsDropChance(float chance) {
+        throw new UnsupportedOperationException();
+    }
 }