Paper/nms-patches/EntityHorseAbstract.patch

--- a/net/minecraft/server/EntityHorseAbstract.java
+++ b/net/minecraft/server/EntityHorseAbstract.java
@@ -5,6 +5,7 @@
 import java.util.UUID;
 import java.util.function.Predicate;
 import javax.annotation.Nullable;
+import org.bukkit.event.entity.EntityRegainHealthEvent.RegainReason; // CraftBukkit
 
 public abstract class EntityHorseAbstract extends EntityAnimal implements IInventoryListener, IJumpable {
 
@@ -33,6 +34,7 @@
     private float bW;
     protected boolean bH = true;
     protected int bI;
+    public int maxDomestication = 100; // CraftBukkit - store max domestication value
 
     protected EntityHorseAbstract(EntityTypes<? extends EntityHorseAbstract> entitytypes, World world) {
         super(entitytypes, world);
@@ -209,7 +211,7 @@
     public void loadChest() {
         InventorySubcontainer inventorysubcontainer = this.inventoryChest;
 
-        this.inventoryChest = new InventorySubcontainer(this.getChestSlots());
+        this.inventoryChest = new InventorySubcontainer(this.getChestSlots(), (org.bukkit.entity.AbstractHorse) this.getBukkitEntity()); // CraftBukkit
         if (inventorysubcontainer != null) {
             inventorysubcontainer.b(this);
             int i = Math.min(inventorysubcontainer.getSize(), this.inventoryChest.getSize());
@@ -332,7 +334,7 @@
     }
 
     public int getMaxDomestication() {
-        return 100;
+        return this.maxDomestication; // CraftBukkit - return stored max domestication instead of 100
     }
 
     @Override
@@ -393,7 +395,7 @@
         }
 
         if (this.getHealth() < this.getMaxHealth() && f > 0.0F) {
-            this.heal(f);
+            this.heal(f, RegainReason.EATING); // CraftBukkit
             flag = true;
         }
 
@@ -469,7 +471,7 @@
         super.movementTick();
         if (!this.world.isClientSide && this.isAlive()) {
             if (this.random.nextInt(900) == 0 && this.deathTicks == 0) {
-                this.heal(1.0F);
+                this.heal(1.0F, RegainReason.REGEN); // CraftBukkit
             }
 
             if (this.et()) {
@@ -716,6 +718,7 @@
         if (this.getOwnerUUID() != null) {
             nbttagcompound.setString("OwnerUUID", this.getOwnerUUID().toString());
         }
+        nbttagcompound.setInt("Bukkit.MaxDomestication", this.maxDomestication); // CraftBukkit
 
         if (!this.inventoryChest.getItem(0).isEmpty()) {
             nbttagcompound.set("SaddleItem", this.inventoryChest.getItem(0).save(new NBTTagCompound()));
@@ -743,6 +746,11 @@
         if (!s.isEmpty()) {
             this.setOwnerUUID(UUID.fromString(s));
         }
+        // CraftBukkit start
+        if (nbttagcompound.hasKey("Bukkit.MaxDomestication")) {
+            this.maxDomestication = nbttagcompound.getInt("Bukkit.MaxDomestication");
+        }
+        // CraftBukkit end
 
         AttributeInstance attributeinstance = this.getAttributeMap().a("Speed");
 
@@ -800,6 +808,18 @@
 
     @Override
     public void b(int i) {
+        // CraftBukkit start
+        float power;
+        if (i >= 90) {
+            power = 1.0F;
+        } else {
+            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()) {
+            return;
+        }
+        // CraftBukkit end
         this.canSlide = true;
         this.eB();
     }