Paper/nms-patches/EntityExperienceOrb.patch

--- a/net/minecraft/server/EntityExperienceOrb.java
+++ b/net/minecraft/server/EntityExperienceOrb.java
@@ -1,5 +1,11 @@
 package net.minecraft.server;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.event.entity.EntityTargetLivingEntityEvent;
+import org.bukkit.event.entity.EntityTargetEvent;
+// CraftBukkit end
+
 public class EntityExperienceOrb extends Entity {
 
     public int a;
@@ -34,6 +40,7 @@
 
     public void t_() {
         super.t_();
+        EntityHuman prevTarget = this.targetPlayer;// CraftBukkit - store old target
         if (this.c > 0) {
             --this.c;
         }
@@ -65,6 +72,16 @@
         }
 
         if (this.targetPlayer != null) {
+            // CraftBukkit start
+            boolean cancelled = false;
+            if (this.targetPlayer != prevTarget) {
+                EntityTargetLivingEntityEvent event = CraftEventFactory.callEntityTargetLivingEvent(this, targetPlayer, EntityTargetEvent.TargetReason.CLOSEST_PLAYER);
+                EntityLiving target = event.getTarget() == null ? null : ((org.bukkit.craftbukkit.entity.CraftLivingEntity) event.getTarget()).getHandle();
+                targetPlayer = target instanceof EntityHuman ? (EntityHuman) target : null;
+                cancelled = event.isCancelled();
+            }
+
+            if (!cancelled && targetPlayer != null) {
             double d1 = (this.targetPlayer.locX - this.locX) / d0;
             double d2 = (this.targetPlayer.locY + (double) this.targetPlayer.getHeadHeight() - this.locY) / d0;
             double d3 = (this.targetPlayer.locZ - this.locZ) / d0;
@@ -77,6 +94,8 @@
                 this.motY += d2 / d4 * d5 * 0.1D;
                 this.motZ += d3 / d4 * d5 * 0.1D;
             }
+            }
+            // CraftBukkit end
         }
 
         this.move(this.motX, this.motY, this.motZ);
@@ -141,7 +160,7 @@
                 entityhuman.bp = 2;
                 this.world.makeSound(entityhuman, "random.orb", 0.1F, 0.5F * ((this.random.nextFloat() - this.random.nextFloat()) * 0.7F + 1.8F));
                 entityhuman.receive(this, 1);
-                entityhuman.giveExp(this.value);
+                entityhuman.giveExp(CraftEventFactory.callPlayerExpChangeEvent(entityhuman, this.value).getAmount()); // CraftBukkit - this.value -> event.getAmount()
                 this.die();
             }
 
@@ -153,6 +172,24 @@
     }
 
     public static int getOrbValue(int i) {
+        // CraftBukkit start
+        if (i > 162670129) return i - 100000;
+        if (i > 81335063) return 81335063;
+        if (i > 40667527) return 40667527;
+        if (i > 20333759) return 20333759;
+        if (i > 10166857) return 10166857;
+        if (i > 5083423) return 5083423;
+        if (i > 2541701) return 2541701;
+        if (i > 1270849) return 1270849;
+        if (i > 635413) return 635413;
+        if (i > 317701) return 317701;
+        if (i > 158849) return 158849;
+        if (i > 79423) return 79423;
+        if (i > 39709) return 39709;
+        if (i > 19853) return 19853;
+        if (i > 9923) return 9923;
+        if (i > 4957) return 4957;
+        // CraftBukkit end
         return i >= 2477 ? 2477 : (i >= 1237 ? 1237 : (i >= 617 ? 617 : (i >= 307 ? 307 : (i >= 149 ? 149 : (i >= 73 ? 73 : (i >= 37 ? 37 : (i >= 17 ? 17 : (i >= 7 ? 7 : (i >= 3 ? 3 : 1)))))))));
     }