Lophine/lophine-server/minecraft-patches/features/0002-Add-config-to-enable-cross-region-damage-trace.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Helvetica Volubi <suisuroru@blue-millennium.fun>
Date: Tue, 29 Apr 2025 23:03:56 +0800
Subject: [PATCH] Add config to enable cross region damage trace


diff --git a/net/minecraft/server/level/ServerPlayer.java b/net/minecraft/server/level/ServerPlayer.java
index 607ce65a719e333ce2275346a356032327d00ccf..dcdb01fe5333d407a10f9872d09992c7b438ddeb 100644
--- a/net/minecraft/server/level/ServerPlayer.java
+++ b/net/minecraft/server/level/ServerPlayer.java
@@ -1445,6 +1445,13 @@ public class ServerPlayer extends Player implements ca.spottedleaf.moonrise.patc
             this.awardStat(Stats.ENTITY_KILLED_BY.get(killCredit.getType()));
             killCredit.awardKillScore(this, damageSource);
             this.createWitherRose(killCredit);
+        // Luminol Start - Cross Region Damage trace
+        } else if (fun.bm.lophine.config.modules.experiment.EntityDamageSourceTraceConfig.enabled) {
+            final LivingEntity entitylivingnew = this.getKillCreditOrigin();
+            if (entitylivingnew != null) {
+                this.damageTransferToAsync(entitylivingnew, cause);
+            }
+        // Luminol End - Cross Region Damage trace
         }
 
         this.level().broadcastEntityEvent(this, EntityEvent.DEATH);
@@ -1468,6 +1475,24 @@ public class ServerPlayer extends Player implements ca.spottedleaf.moonrise.patc
     }
     // Leaves end - exp fix
 
+    // Luminol Start - Cross Region Damage trace
+    private void damageTransferToAsync(LivingEntity entity, DamageSource cause) {
+        // Operations running on current entity
+        this.awardStat(Stats.ENTITY_KILLED_BY.get(entity.getType()));
+        this.createWitherRose(entity);
+
+        // the entity might be in another tickregion sometimes, so we need to schedule the task onto the entity
+        // to ensure thread safe
+        entity.getBukkitEntity().taskScheduler.schedule((LivingEntity nmsEntity) -> {
+            try {
+                nmsEntity.awardKillScore(this, cause);
+            } catch (Throwable ex) {
+                LOGGER.error(ex.getMessage(), ex);
+            }
+        }, null, 1L);
+    }
+    // Luminol End - Cross Region Damage trace
+
     private void tellNeutralMobsThatIDied() {
         AABB aabb = new AABB(this.blockPosition()).inflate(32.0, 10.0, 32.0);
         this.level()
diff --git a/net/minecraft/world/entity/LivingEntity.java b/net/minecraft/world/entity/LivingEntity.java
index 7a63f52efca133d9d1a773da2443333009d87113..5bae274f5ee869e540e4330e03af671b6b18313d 100644
--- a/net/minecraft/world/entity/LivingEntity.java
+++ b/net/minecraft/world/entity/LivingEntity.java
@@ -1975,6 +1975,13 @@ public abstract class LivingEntity extends Entity implements Attackable, Waypoin
             final LivingEntity killer = this.getKillCredit();
             if (killer != null) {
                 killer.awardKillScore(this, damageSource);
+            // Luminol Start - Cross Region Damage trace
+            } else if (fun.bm.lophine.config.modules.experiment.EntityDamageSourceTraceConfig.enabled) {
+                final LivingEntity killernew = this.getKillCreditOrigin();
+                if (killernew != null) {
+                    this.damageTransferToAsync(killernew, damageSource);
+                }
+            // Luminol End - Cross Region Damage trace
             }
         }); // Paper end
         this.postDeathDropItems(deathEvent); // Paper
@@ -1985,6 +1992,18 @@ public abstract class LivingEntity extends Entity implements Attackable, Waypoin
         return deathEvent; // Paper
     }
 
+    // Luminol Start - Cross Region Damage trace
+    private void damageTransferToAsync(LivingEntity entity, DamageSource damageSource) {
+        entity.getBukkitEntity().taskScheduler.schedule((LivingEntity nmsEntity) -> {
+            try {
+                nmsEntity.awardKillScore(this, damageSource);
+            } catch (Throwable ex) {
+                LOGGER.error(ex.getMessage(), ex);
+            }
+        }, null, 1L );
+    }
+    // Luminol End - Cross Region Damage trace
+
     protected void dropEquipment(ServerLevel level) {
     }
     protected void postDeathDropItems(org.bukkit.event.entity.EntityDeathEvent event) {} // Paper - method for post death logic that cannot be ran before the event is potentially cancelled
@@ -2612,6 +2631,18 @@ public abstract class LivingEntity extends Entity implements Attackable, Waypoin
         }
     }
 
+    // Luminol Start - Cross Region Damage trace
+    @Nullable
+    public LivingEntity getKillCreditOrigin() {
+        if (this.lastHurtByPlayer != null) {
+            return this.lastHurtByPlayer.getEntity(this.level(), Player.class);
+        } else if (this.lastHurtByMob != null) {
+            return this.lastHurtByMob.getEntity(this.level(), LivingEntity.class);
+        }
+        return null;
+    }
+    // Luminol End - Cross Region Damage trace
+
     public final float getMaxHealth() {
         return (float)this.getAttributeValue(Attributes.MAX_HEALTH);
     }