Implement Horse API. Adds BUKKIT-4424

API has been added to interface with Horses and to modify their inventories. Horse entities will now be recognized with the type EntityType.HORSE, and will no longer be UNKNOWN.

HorseJumpEvent, EntityDamageEvent, and EntityTameEvent are all correctly fired for horses.

This commit fixes BUKKIT-4393.

src/main/java/net/minecraft/server/EntityHorse.java

@@ -3,10 +3,15 @@ package net.minecraft.server;
 import java.util.Iterator;
 import java.util.List;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.event.entity.EntityDamageEvent;
+// CraftBukkit end
+
 public class EntityHorse extends EntityAnimal implements IInventoryListener {
 
     private static final IEntitySelector bu = new EntitySelectorHorse();
-    private static final IAttribute attributeJumpStrength = (new AttributeRanged("horse.jumpStrength", 0.7D, 0.0D, 2.0D)).a("Jump Strength").a(true);
+    public static final IAttribute attributeJumpStrength = (new AttributeRanged("horse.jumpStrength", 0.7D, 0.0D, 2.0D)).a("Jump Strength").a(true); // CraftBukkit - private -> public
     private static final String[] bw = new String[] { null, "textures/entity/horse/armor/horse_armor_iron.png", "textures/entity/horse/armor/horse_armor_gold.png", "textures/entity/horse/armor/horse_armor_diamond.png"};
     private static final String[] bx = new String[] { "", "meo", "goo", "dio"};
     private static final int[] by = new int[] { 0, 5, 7, 11};
@@ -20,7 +25,7 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
     public int bp;
     public int bq;
     protected boolean br;
-    private InventoryHorseChest inventoryChest;
+    public InventoryHorseChest inventoryChest; // CraftBukkit - private -> public
     private boolean bH;
     protected int bs;
     protected float bt;
@@ -34,6 +39,7 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
     private int bP;
     private String bQ;
     private String[] bR = new String[3];
+    public int maxDomestication = 100; // CraftBukkit - store max domestication value
 
     public EntityHorse(World world) {
         super(world);
@@ -281,9 +287,26 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
         int i = MathHelper.f(f * 0.5F - 3.0F);
 
         if (i > 0) {
-            this.damageEntity(DamageSource.FALL, (float) i);
+            // CraftBukkit start
+            EntityDamageEvent event = CraftEventFactory.callEntityDamageEvent(null, this, EntityDamageEvent.DamageCause.FALL, i);
+            if (!event.isCancelled()) {
+                float damage = (float) event.getDamage();
+                if (damage > 0) {
+                    this.getBukkitEntity().setLastDamageCause(event);
+                    this.damageEntity(DamageSource.FALL, damage);
+                }
+            }
+
             if (this.passenger != null) {
-                this.passenger.damageEntity(DamageSource.FALL, (float) i);
+                EntityDamageEvent passengerEvent = CraftEventFactory.callEntityDamageEvent(null, this.passenger, EntityDamageEvent.DamageCause.FALL, i);
+                if (!passengerEvent.isCancelled() && this.passenger != null) { // Check again in case of plugin
+                    float damage = (float) passengerEvent.getDamage();
+                    if (damage > 0) {
+                        this.passenger.getBukkitEntity().setLastDamageCause(passengerEvent);
+                        this.passenger.damageEntity(DamageSource.FALL, damage);
+                    }
+                }
+                // CraftBukkit end
             }
 
             int j = this.world.getTypeId(MathHelper.floor(this.locX), MathHelper.floor(this.locY - 0.2D - (double) this.lastYaw), MathHelper.floor(this.locZ));
@@ -299,10 +322,10 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
     private int cG() {
         int i = this.getType();
 
-        return this.hasChest() && (i == 1 || i == 2) ? 17 : 2;
+        return this.hasChest() /* && (i == 1 || i == 2) */ ? 17 : 2; // CraftBukkit - Remove type check
     }
 
-    private void cH() {
+    public void cH() { // CraftBukkit - private -> public
         InventoryHorseChest inventoryhorsechest = this.inventoryChest;
 
         this.inventoryChest = new InventoryHorseChest("HorseChest", this.cG());
@@ -467,7 +490,7 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
     }
 
     public int cq() {
-        return 100;
+        return this.maxDomestication; // CraftBukkit - return stored max domestication instead of 100
     }
 
     protected float aZ() {
@@ -928,6 +951,7 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
         nbttagcompound.setInt("Temper", this.getTemper());
         nbttagcompound.setBoolean("Tame", this.isTame());
         nbttagcompound.setString("OwnerName", this.getOwnerName());
+        nbttagcompound.setInt("Bukkit.MaxDomestication", this.maxDomestication); // CraftBukkit
         if (this.hasChest()) {
             NBTTagList nbttaglist = new NBTTagList();
 
@@ -968,7 +992,11 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
         if (nbttagcompound.hasKey("OwnerName")) {
             this.setOwnerName(nbttagcompound.getString("OwnerName"));
         }
-
+        // CraftBukkit start
+        if (nbttagcompound.hasKey("Bukkit.MaxDomestication")) {
+            this.maxDomestication = nbttagcompound.getInt("Bukkit.MaxDomestication");
+        }
+        // CraftBukkit end
         AttributeInstance attributeinstance = this.aW().a("Speed");
 
         if (attributeinstance != null) {
@@ -1138,18 +1166,25 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
 
     public void u(int i) {
         if (this.co()) {
+            // CraftBukkit start - fire HorseJumpEvent, use event power
             if (i < 0) {
                 i = 0;
-            } else {
-                this.bI = true;
-                this.cO();
             }
 
+            float power;
             if (i >= 90) {
-                this.bt = 1.0F;
+                power = 1.0F;
             } else {
-                this.bt = 0.4F + 0.4F * (float) i / 90.0F;
+                power = 0.4F + 0.4F * (float) i / 90.0F;
             }
+
+            org.bukkit.event.entity.HorseJumpEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callHorseJumpEvent(this, power);
+            if (!event.isCancelled()) {
+                this.bI = true;
+                this.cO();
+                this.bt = event.getPower();
+            }
+            // CraftBukkit end
         }
     }
 

src/main/java/net/minecraft/server/PathfinderGoalTame.java

@@ -45,7 +45,8 @@ public class PathfinderGoalTame extends PathfinderGoal {
                 int i = this.entity.getTemper();
                 int j = this.entity.cq();
 
-                if (j > 0 && this.entity.aC().nextInt(j) < i) {
+                // CraftBukkit
+                if (j > 0 && this.entity.aC().nextInt(j) < i && !org.bukkit.craftbukkit.event.CraftEventFactory.callEntityTameEvent(this.entity, (EntityHuman) this.entity.passenger).isCancelled() && this.entity.passenger instanceof EntityHuman) {
                     this.entity.g((EntityHuman) this.entity.passenger);
                     this.entity.world.broadcastEntityEffect(this.entity, (byte) 7);
                     return;
@@ -54,7 +55,7 @@ public class PathfinderGoalTame extends PathfinderGoal {
                 this.entity.t(5);
             }
 
-            this.entity.passenger.mount((Entity) null);
+            if (this.entity.passenger != null) this.entity.passenger.mount((Entity) null); // CraftBukkit - Check for null
             this.entity.passenger = null;
             this.entity.cD();
             this.entity.world.broadcastEntityEffect(this.entity, (byte) 6);

src/main/java/org/bukkit/craftbukkit/CraftWorld.java

@@ -906,6 +906,8 @@ public class CraftWorld implements World {
                 // need a net server handler for this one
             } else if (Sheep.class.isAssignableFrom(clazz)) {
                 entity = new EntitySheep(world);
+            } else if (Horse.class.isAssignableFrom(clazz)) {
+                entity = new EntityHorse(world);
             } else if (Skeleton.class.isAssignableFrom(clazz)) {
                 entity = new EntitySkeleton(world);
             } else if (Slime.class.isAssignableFrom(clazz)) {

src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java

@@ -51,6 +51,7 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
                         else if (entity instanceof EntityOcelot) { return new CraftOcelot(server, (EntityOcelot) entity); }
                     }
                     else if (entity instanceof EntitySheep) { return new CraftSheep(server, (EntitySheep) entity); }
+                    else if (entity instanceof EntityHorse) { return new CraftHorse(server, (EntityHorse) entity); }
                     else  { return new CraftAnimals(server, (EntityAnimal) entity); }
                 }
                 // Monsters

src/main/java/org/bukkit/craftbukkit/entity/CraftHorse.java

@@ -1,20 +1,133 @@
 package org.bukkit.craftbukkit.entity;
 
-import net.minecraft.server.EntityAnimal;
-
+import net.minecraft.server.EntityHorse;
+import org.apache.commons.lang.Validate;
 import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.craftbukkit.inventory.CraftInventoryHorse;
+import org.bukkit.entity.AnimalTamer;
 import org.bukkit.entity.EntityType;
 import org.bukkit.entity.Horse;
+import org.bukkit.inventory.HorseInventory;
 
 public class CraftHorse extends CraftAnimals implements Horse {
 
-    public CraftHorse(CraftServer server, EntityAnimal entity) {
+    public CraftHorse(CraftServer server, EntityHorse entity) {
         super(server, entity);
     }
 
+    @Override
+    public EntityHorse getHandle() {
+        return (EntityHorse) entity;
+    }
+
+    public Variant getVariant() {
+        return Variant.values()[getHandle().getType()];
+    }
+
+    public void setVariant(Variant variant) {
+        Validate.notNull(variant, "Variant cannot be null");
+        getHandle().setType(variant.ordinal());
+    }
+
+    public Color getColor() {
+        return Color.values()[getHandle().getVariant() & 0xFF];
+    }
+
+    public void setColor(Color color) {
+        Validate.notNull(color, "Color cannot be null");
+        getHandle().setVariant(color.ordinal() & 0xFF | getStyle().ordinal() << 8);
+    }
+
+    public Style getStyle() {
+        return Style.values()[getHandle().getVariant() >>> 8];
+    }
+
+    public void setStyle(Style style) {
+        Validate.notNull(style, "Style cannot be null");
+        getHandle().setVariant(getColor().ordinal() & 0xFF | style.ordinal() << 8);
+    }
+
+    public boolean isCarryingChest() {
+        return getHandle().hasChest();
+    }
+
+    public void setCarryingChest(boolean chest) {
+        if (chest == isCarryingChest()) return;
+        getHandle().setHasChest(chest);
+        getHandle().cH(); // Should be loadChest
+    }
+
+    public int getDomestication() {
+        return getHandle().getTemper();
+    }
+
+    public void setDomestication(int value) {
+        Validate.isTrue(value >= 0, "Domestication cannot be less than zero");
+        Validate.isTrue(value <= getMaxDomestication(), "Domestication cannot be greater than the max domestication");
+        getHandle().setTemper(value);
+    }
+
+    public int getMaxDomestication() {
+        return getHandle().cq(); // Should be getMaxDomestication
+    }
+
+    public void setMaxDomestication(int value) {
+        Validate.isTrue(value > 0, "Max domestication cannot be zero or less");
+        getHandle().maxDomestication = value;
+    }
+
+    public double getJumpStrength() {
+        return getHandle().getJumpStrength();
+    }
+
+    public void setJumpStrength(double strength) {
+        Validate.isTrue(strength >= 0, "Jump strength cannot be less than zero");
+        getHandle().getAttributeInstance(EntityHorse.attributeJumpStrength).setValue(strength);
+    }
+
+    @Override
+    public boolean isTamed() {
+        return getHandle().isTame();
+    }
+
+    @Override
+    public void setTamed(boolean tamed) {
+        getHandle().setTame(tamed);
+    }
+
+    @Override
+    public AnimalTamer getOwner() {
+        if (getOwnerName() == null || "".equals(getOwnerName())) return null;
+        return getServer().getOfflinePlayer(getOwnerName());
+    }
+
+    @Override
+    public void setOwner(AnimalTamer owner) {
+        if (owner != null && !"".equals(owner.getName())) {
+            setTamed(true);
+            getHandle().setPathEntity(null);
+            setOwnerName(owner.getName());
+        } else {
+            setTamed(false);
+            setOwnerName("");
+        }
+    }
+
+    public String getOwnerName() {
+        return getHandle().getOwnerName();
+    }
+
+    public void setOwnerName(String name) {
+        getHandle().setOwnerName(name);
+    }
+
+    public HorseInventory getInventory() {
+        return new CraftInventoryHorse(getHandle().inventoryChest);
+    }
+
     @Override
     public String toString() {
-        return "CraftHorse";
+        return "CraftHorse{variant=" + getVariant() + ", owner=" + getOwner() + '}';
     }
 
     public EntityType getType() {

src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java

@@ -48,6 +48,7 @@ import org.bukkit.entity.AnimalTamer;
 import org.bukkit.entity.Arrow;
 import org.bukkit.entity.Creeper;
 import org.bukkit.entity.EntityType;
+import org.bukkit.entity.Horse;
 import org.bukkit.entity.LightningStrike;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.entity.Pig;
@@ -492,6 +493,12 @@ public class CraftEventFactory {
         return event;
     }
 
+    public static HorseJumpEvent callHorseJumpEvent(Entity horse, float power) {
+        HorseJumpEvent event = new HorseJumpEvent((Horse) horse.getBukkitEntity(), power);
+        horse.getBukkitEntity().getServer().getPluginManager().callEvent(event);
+        return event;
+    }
+
     public static EntityChangeBlockEvent callEntityChangeBlockEvent(org.bukkit.entity.Entity entity, Block block, Material material) {
         return callEntityChangeBlockEvent(entity, block, material, 0);
     }

src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryHorse.java

@@ -1,25 +1,28 @@
 package org.bukkit.craftbukkit.inventory;
 
 import net.minecraft.server.IInventory;
+import org.bukkit.inventory.HorseInventory;
+import org.bukkit.inventory.ItemStack;
 
-public class CraftInventoryHorse extends CraftInventory {
-    private final IInventory resultInventory = null;
+public class CraftInventoryHorse extends CraftInventory implements HorseInventory {
 
     public CraftInventoryHorse(IInventory inventory) {
         super(inventory);
     }
 
-    public IInventory getResultInventory() {
-        return resultInventory;
+    public ItemStack getSaddle() {
+        return getItem(0);
     }
 
-    public IInventory getIngredientsInventory() {
-        return inventory;
+    public ItemStack getArmor() {
+       return getItem(1);
     }
 
-    @Override
-    public int getSize() {
-        //return getResultInventory().getSize() + getIngredientsInventory().getSize();
-        return getIngredientsInventory().getSize();
+    public void setSaddle(ItemStack stack) {
+        setItem(0, stack);
+    }
+
+    public void setArmor(ItemStack stack) {
+        setItem(1, stack);
     }
 }