Paper/nms-patches/EntityInsentient.patch

--- ../work/decompile-8eb82bde//net/minecraft/server/EntityInsentient.java	Sat Dec  6 21:48:11 2014
+++ src/main/java/net/minecraft/server/EntityInsentient.java	Sat Dec  6 21:18:38 2014
@@ -4,6 +4,15 @@
 import java.util.List;
 import java.util.UUID;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.craftbukkit.entity.CraftLivingEntity;
+import org.bukkit.event.entity.EntityTargetLivingEntityEvent;
+import org.bukkit.event.entity.EntityTargetEvent;
+import org.bukkit.event.entity.EntityUnleashEvent;
+import org.bukkit.event.entity.EntityUnleashEvent.UnleashReason;
+// CraftBukkit end
+
 public abstract class EntityInsentient extends EntityLiving {
 
     public int a_;
@@ -13,8 +22,8 @@
     protected ControllerJump g;
     private EntityAIBodyControl b;
     protected NavigationAbstract navigation;
-    protected final PathfinderGoalSelector goalSelector;
-    protected final PathfinderGoalSelector targetSelector;
+    public PathfinderGoalSelector goalSelector; // PAIL protected final to public
+    public PathfinderGoalSelector targetSelector; // PAIL protected final to public
     private EntityLiving goalTarget;
     private EntitySenses bi;
     private ItemStack[] equipment = new ItemStack[5];
@@ -39,7 +48,9 @@
         for (int i = 0; i < this.dropChances.length; ++i) {
             this.dropChances[i] = 0.085F;
         }
-
+        // CraftBukkit start - default persistance to type's persistance value
+        this.persistent = !isTypeNotPersistent();
+        // CraftBukkit end
     }
 
     protected void aW() {
@@ -76,7 +87,37 @@
     }
 
     public void setGoalTarget(EntityLiving entityliving) {
+        // CraftBukkit start - fire event
+        setGoalTarget(entityliving, EntityTargetEvent.TargetReason.UNKNOWN, true);
+    }
+    
+    public void setGoalTarget(EntityLiving entityliving, EntityTargetEvent.TargetReason reason, boolean fireEvent) {
+        if (getGoalTarget() == entityliving) return;
+        if (fireEvent) {
+            if (reason == EntityTargetEvent.TargetReason.UNKNOWN && getGoalTarget() != null && entityliving == null) {
+                reason = getGoalTarget().isAlive() ? EntityTargetEvent.TargetReason.FORGOT_TARGET : EntityTargetEvent.TargetReason.TARGET_DIED;
+            }
+            if (reason == EntityTargetEvent.TargetReason.UNKNOWN) {
+                world.getServer().getLogger().log(java.util.logging.Level.WARNING, "Unknown target reason, please report on the issue tracker", new Exception());
+            }
+            CraftLivingEntity ctarget = null;
+            if (entityliving != null) {
+                ctarget = (CraftLivingEntity) entityliving.getBukkitEntity();
+            }
+            EntityTargetLivingEntityEvent event = new EntityTargetLivingEntityEvent(this.getBukkitEntity(), ctarget, reason);
+            world.getServer().getPluginManager().callEvent(event);
+            if (event.isCancelled()) {
+                return;
+            }
+            
+            if (event.getTarget() != null) {
+                entityliving = ((CraftLivingEntity) event.getTarget()).getHandle();
+            } else {
+                entityliving = null;
+            }
+        }
         this.goalTarget = entityliving;
+        // CraftBukkit end
     }
 
     public boolean a(Class oclass) {
@@ -235,11 +276,21 @@
 
     public void a(NBTTagCompound nbttagcompound) {
         super.a(nbttagcompound);
+
+        // CraftBukkit start - If looting or persistence is false only use it if it was set after we started using it
         if (nbttagcompound.hasKeyOfType("CanPickUpLoot", 1)) {
-            this.j(nbttagcompound.getBoolean("CanPickUpLoot"));
+            boolean data = nbttagcompound.getBoolean("CanPickUpLoot");
+            if (isLevelAtLeast(nbttagcompound, 1) || data) {
+                this.j(data);
+            }
         }
 
-        this.persistent = nbttagcompound.getBoolean("PersistenceRequired");
+        boolean data = nbttagcompound.getBoolean("PersistenceRequired");
+        if (isLevelAtLeast(nbttagcompound, 1) || data) {
+            this.persistent = data;
+        }
+        // CraftBukkit end
+        
         NBTTagList nbttaglist;
         int i;
 
@@ -380,11 +431,11 @@
                 double d2 = entityhuman.locZ - this.locZ;
                 double d3 = d0 * d0 + d1 * d1 + d2 * d2;
 
-                if (this.isTypeNotPersistent() && d3 > 16384.0D) {
+                if (d3 > 16384.0D) { // CraftBukkit - remove isTypeNotPersistent() check
                     this.die();
                 }
 
-                if (this.aO > 600 && this.random.nextInt(800) == 0 && d3 > 1024.0D && this.isTypeNotPersistent()) {
+                if (this.aO > 600 && this.random.nextInt(800) == 0 && d3 > 1024.0D) { // CraftBukkit - remove isTypeNotPersistent() check
                     this.die();
                 } else if (d3 < 1024.0D) {
                     this.aO = 0;
@@ -707,6 +758,12 @@
 
     public final boolean e(EntityHuman entityhuman) {
         if (this.cb() && this.getLeashHolder() == entityhuman) {
+            // CraftBukkit start - fire PlayerUnleashEntityEvent
+            if (CraftEventFactory.callPlayerUnleashEntityEvent(this, entityhuman).isCancelled()) {
+                ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutAttachEntity(1, this, this.getLeashHolder()));
+                return false;
+            }
+            // CraftBukkit end
             this.unleash(true, !entityhuman.abilities.canInstantlyBuild);
             return true;
         } else {
@@ -714,12 +771,24 @@
 
             if (itemstack != null && itemstack.getItem() == Items.LEAD && this.ca()) {
                 if (!(this instanceof EntityTameableAnimal) || !((EntityTameableAnimal) this).isTamed()) {
+                    // CraftBukkit start - fire PlayerLeashEntityEvent
+                    if (CraftEventFactory.callPlayerLeashEntityEvent(this, entityhuman, entityhuman).isCancelled()) {
+                        ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutAttachEntity(1, this, this.getLeashHolder()));
+                        return false;
+                    }
+                    // CraftBukkit end
                     this.setLeashHolder(entityhuman, true);
                     --itemstack.count;
                     return true;
                 }
 
                 if (((EntityTameableAnimal) this).e((EntityLiving) entityhuman)) {
+                    // CraftBukkit start - fire PlayerLeashEntityEvent
+                    if (CraftEventFactory.callPlayerLeashEntityEvent(this, entityhuman, entityhuman).isCancelled()) {
+                        ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutAttachEntity(1, this, this.getLeashHolder()));
+                        return false;
+                    }
+                    // CraftBukkit end
                     this.setLeashHolder(entityhuman, true);
                     --itemstack.count;
                     return true;
@@ -741,10 +810,12 @@
 
         if (this.bm) {
             if (!this.isAlive()) {
+                this.world.getServer().getPluginManager().callEvent(new EntityUnleashEvent(this.getBukkitEntity(), UnleashReason.PLAYER_UNLEASH)); // CraftBukkit
                 this.unleash(true, true);
             }
 
             if (this.bn == null || this.bn.dead) {
+                this.world.getServer().getPluginManager().callEvent(new EntityUnleashEvent(this.getBukkitEntity(), UnleashReason.HOLDER_GONE)); // CraftBukkit
                 this.unleash(true, true);
             }
         }
@@ -811,6 +882,7 @@
 
                 this.bn = entityleash;
             } else {
+                this.world.getServer().getPluginManager().callEvent(new EntityUnleashEvent(this.getBukkitEntity(), UnleashReason.UNKNOWN)); // CraftBukkit
                 this.unleash(false, true);
             }
         }