PaperMC/Spigot-Server-Patches/Add-dropLeash-variable-to-EntityUnleashEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Nassim Jahnke <nassim@njahnke.dev>
Date: Fri, 29 Jan 2021 15:13:11 +0100
Subject: [PATCH] Add dropLeash variable to EntityUnleashEvent


diff --git a/src/main/java/net/minecraft/world/entity/EntityCreature.java b/src/main/java/net/minecraft/world/entity/EntityCreature.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/EntityCreature.java
+++ b/src/main/java/net/minecraft/world/entity/EntityCreature.java
@@ -0,0 +0,0 @@ public abstract class EntityCreature extends EntityInsentient {
 
             if (this instanceof EntityTameableAnimal && ((EntityTameableAnimal) this).isSitting()) {
                 if (f > entity.world.paperConfig.maxLeashDistance) { // Paper
-                    this.world.getServer().getPluginManager().callEvent(new EntityUnleashEvent(this.getBukkitEntity(), EntityUnleashEvent.UnleashReason.DISTANCE)); // CraftBukkit
-                    this.unleash(true, true);
+                    // Paper start - drop leash variable
+                    EntityUnleashEvent event = new EntityUnleashEvent(this.getBukkitEntity(), EntityUnleashEvent.UnleashReason.DISTANCE, true);
+                    this.world.getServer().getPluginManager().callEvent(event); // CraftBukkit
+                    this.unleash(true, event.isDropLeash());
+                    // Paper end
                 }
 
                 return;
@@ -0,0 +0,0 @@ public abstract class EntityCreature extends EntityInsentient {
 
             this.x(f);
             if (f > entity.world.paperConfig.maxLeashDistance) { // Paper
-                this.world.getServer().getPluginManager().callEvent(new EntityUnleashEvent(this.getBukkitEntity(), EntityUnleashEvent.UnleashReason.DISTANCE)); // CraftBukkit
-                this.unleash(true, true);
+                // Paper start - drop leash variable
+                EntityUnleashEvent event = new EntityUnleashEvent(this.getBukkitEntity(), EntityUnleashEvent.UnleashReason.DISTANCE, true);
+                this.world.getServer().getPluginManager().callEvent(event); // CraftBukkit
+                this.unleash(true, event.isDropLeash());
+                // Paper end
                 this.goalSelector.a(PathfinderGoal.Type.MOVE);
             } else if (f > 6.0F) {
                 double d0 = (entity.locX() - this.locX()) / (double) f;
diff --git a/src/main/java/net/minecraft/world/entity/EntityInsentient.java b/src/main/java/net/minecraft/world/entity/EntityInsentient.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/EntityInsentient.java
+++ b/src/main/java/net/minecraft/world/entity/EntityInsentient.java
@@ -0,0 +0,0 @@ import org.bukkit.event.entity.EntityTargetEvent;
 import org.bukkit.event.entity.EntityTransformEvent;
 import org.bukkit.event.entity.EntityUnleashEvent;
 import org.bukkit.event.entity.EntityUnleashEvent.UnleashReason;
+import org.bukkit.event.player.PlayerUnleashEntityEvent; // Paper
 // CraftBukkit end
 
 public abstract class EntityInsentient extends EntityLiving {
@@ -0,0 +0,0 @@ public abstract class EntityInsentient extends EntityLiving {
             return EnumInteractionResult.PASS;
         } else if (this.getLeashHolder() == entityhuman) {
             // CraftBukkit start - fire PlayerUnleashEntityEvent
-            if (CraftEventFactory.callPlayerUnleashEntityEvent(this, entityhuman).isCancelled()) {
+            // Paper start - drop leash variable
+            PlayerUnleashEntityEvent event = CraftEventFactory.callPlayerUnleashEntityEvent(this, entityhuman, !entityhuman.abilities.canInstantlyBuild);
+            if (event.isCancelled()) {
+                // Paper end
                 ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutAttachEntity(this, this.getLeashHolder()));
                 return EnumInteractionResult.PASS;
             }
             // CraftBukkit end
-            this.unleash(true, !entityhuman.abilities.canInstantlyBuild);
+            this.unleash(true, event.isDropLeash()); // Paper - drop leash variable
             return EnumInteractionResult.a(this.world.isClientSide);
         } else {
             EnumInteractionResult enuminteractionresult = this.c(entityhuman, enumhand);
@@ -0,0 +0,0 @@ public abstract class EntityInsentient extends EntityLiving {
 
         if (this.leashHolder != null) {
             if (!this.isAlive() || !this.leashHolder.isAlive()) {
-                this.world.getServer().getPluginManager().callEvent(new EntityUnleashEvent(this.getBukkitEntity(), (!this.isAlive()) ? UnleashReason.PLAYER_UNLEASH : UnleashReason.HOLDER_GONE)); // CraftBukkit
-                this.unleash(true, true);
+                // Paper start - drop leash variable
+                EntityUnleashEvent event = new EntityUnleashEvent(this.getBukkitEntity(), (!this.isAlive()) ? UnleashReason.PLAYER_UNLEASH : UnleashReason.HOLDER_GONE, true);
+                this.world.getServer().getPluginManager().callEvent(event); // CraftBukkit
+                this.unleash(true, event.isDropLeash());
+                // Paper end
             }
 
         }
@@ -0,0 +0,0 @@ public abstract class EntityInsentient extends EntityLiving {
         boolean flag1 = super.a(entity, flag);
 
         if (flag1 && this.isLeashed()) {
-            this.world.getServer().getPluginManager().callEvent(new EntityUnleashEvent(this.getBukkitEntity(), UnleashReason.UNKNOWN)); // CraftBukkit
-            this.unleash(true, true);
+            // Paper start - drop leash variable
+            EntityUnleashEvent event = new EntityUnleashEvent(this.getBukkitEntity(), UnleashReason.UNKNOWN, true);
+            this.world.getServer().getPluginManager().callEvent(event); // CraftBukkit
+            this.unleash(true, event.isDropLeash());
+            // Paper end
         }
 
         return flag1;
@@ -0,0 +0,0 @@ public abstract class EntityInsentient extends EntityLiving {
     @Override
     protected void bN() {
         super.bN();
-        this.world.getServer().getPluginManager().callEvent(new EntityUnleashEvent(this.getBukkitEntity(), UnleashReason.UNKNOWN)); // CraftBukkit
-        this.unleash(true, false);
+        // Paper start - drop leash variable
+        EntityUnleashEvent event = new EntityUnleashEvent(this.getBukkitEntity(), UnleashReason.UNKNOWN, false);
+        this.world.getServer().getPluginManager().callEvent(event); // CraftBukkit
+        this.unleash(true, event.isDropLeash());
+        // Paper end
     }
 }
diff --git a/src/main/java/net/minecraft/world/entity/decoration/EntityLeash.java b/src/main/java/net/minecraft/world/entity/decoration/EntityLeash.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/decoration/EntityLeash.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/EntityLeash.java
@@ -0,0 +0,0 @@ import net.minecraft.server.level.WorldServer;
 import org.bukkit.craftbukkit.event.CraftEventFactory;
 // CraftBukkit end
 
+import org.bukkit.event.player.PlayerUnleashEntityEvent; // Paper
+
 public class EntityLeash extends EntityHanging {
 
     public EntityLeash(EntityTypes<? extends EntityLeash> entitytypes, World world) {
@@ -0,0 +0,0 @@ public class EntityLeash extends EntityHanging {
                         entityinsentient = (EntityInsentient) iterator.next();
                         if (entityinsentient.isLeashed() && entityinsentient.getLeashHolder() == this) {
                             // CraftBukkit start
-                            if (CraftEventFactory.callPlayerUnleashEntityEvent(entityinsentient, entityhuman).isCancelled()) {
+                            // Paper start - drop leash variable
+                            PlayerUnleashEntityEvent event = CraftEventFactory.callPlayerUnleashEntityEvent(entityinsentient, entityhuman, !entityhuman.abilities.canInstantlyBuild);
+                            if (event.isCancelled()) {
+                                // Paper end
                                 die = false;
                                 continue;
                             }
-                            entityinsentient.unleash(true, !entityhuman.abilities.canInstantlyBuild); // false -> survival mode boolean
+                            entityinsentient.unleash(true, event.isDropLeash()); // false -> survival mode boolean // Paper - drop leash variable
                             // CraftBukkit end
                         }
                     }
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -0,0 +0,0 @@ public class CraftEventFactory {
         return itemInHand;
     }
 
-    public static PlayerUnleashEntityEvent callPlayerUnleashEntityEvent(EntityInsentient entity, EntityHuman player) {
-        PlayerUnleashEntityEvent event = new PlayerUnleashEntityEvent(entity.getBukkitEntity(), (Player) player.getBukkitEntity());
+    // Paper start - drop leash variable
+    public static PlayerUnleashEntityEvent callPlayerUnleashEntityEvent(EntityInsentient entity, EntityHuman player, boolean dropLeash) {
+        PlayerUnleashEntityEvent event = new PlayerUnleashEntityEvent(entity.getBukkitEntity(), (Player) player.getBukkitEntity(), dropLeash);
+        // Paper end
         entity.world.getServer().getPluginManager().callEvent(event);
         return event;
     }