Paper/patches/server/0111-Add-ProjectileCollideEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Techcable <Techcable@outlook.com>
Date: Fri, 16 Dec 2016 21:25:39 -0600
Subject: [PATCH] Add ProjectileCollideEvent


diff --git a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
index 7cd802be238cedf166174a61e816d9d4b29b87d2..7f1f4813ac007fbf79e8ba254075c015fe15e3a1 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
@@ -226,6 +226,17 @@ public abstract class AbstractArrow extends Projectile {
                     }
                 }
 
+                // Paper start - Call ProjectileCollideEvent
+                // TODO: flag - noclip - call cancelled?
+                if (object instanceof EntityHitResult) {
+                    com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callProjectileCollideEvent(this, (EntityHitResult)object);
+                    if (event.isCancelled()) {
+                        object = null;
+                        movingobjectpositionentity = null;
+                    }
+                }
+                // Paper end
+
                 if (object != null && !flag) {
                     this.preOnHit((HitResult) object); // CraftBukkit - projectile hit event
                     this.hasImpulse = true;
diff --git a/src/main/java/net/minecraft/world/entity/projectile/AbstractHurtingProjectile.java b/src/main/java/net/minecraft/world/entity/projectile/AbstractHurtingProjectile.java
index 867e50769af3c5bdbed15cfd637e429dcfcb6920..d71dc286673fa7ed708be5bec4c5a6868874c090 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/AbstractHurtingProjectile.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/AbstractHurtingProjectile.java
@@ -11,6 +11,7 @@ import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.EntityType;
 import net.minecraft.world.entity.LivingEntity;
 import net.minecraft.world.level.Level;
+import net.minecraft.world.phys.EntityHitResult;
 import net.minecraft.world.phys.HitResult;
 import net.minecraft.world.phys.Vec3;
 import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit
@@ -82,7 +83,16 @@ public abstract class AbstractHurtingProjectile extends Projectile {
 
             HitResult movingobjectposition = ProjectileUtil.getHitResult(this, this::canHitEntity);
 
-            if (movingobjectposition.getType() != HitResult.Type.MISS) {
+            // Paper start - Call ProjectileCollideEvent
+            if (movingobjectposition instanceof EntityHitResult) {
+                com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = CraftEventFactory.callProjectileCollideEvent(this, (EntityHitResult)movingobjectposition);
+                if (event.isCancelled()) {
+                    movingobjectposition = null;
+                }
+            }
+            // Paper end
+
+            if (movingobjectposition != null && movingobjectposition.getType() != HitResult.Type.MISS) { // Paper - add null check in case cancelled
                 this.preOnHit(movingobjectposition); // CraftBukkit - projectile hit event
 
                 // CraftBukkit start - Fire ProjectileHitEvent
diff --git a/src/main/java/net/minecraft/world/entity/projectile/ThrowableProjectile.java b/src/main/java/net/minecraft/world/entity/projectile/ThrowableProjectile.java
index 88181c59e604ba3b132b9e695cef5eaf5b836029..94d09b05737679b133ec462815b010b19c01b4fa 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/ThrowableProjectile.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/ThrowableProjectile.java
@@ -10,6 +10,7 @@ import net.minecraft.world.level.block.entity.BlockEntity;
 import net.minecraft.world.level.block.entity.TheEndGatewayBlockEntity;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.phys.BlockHitResult;
+import net.minecraft.world.phys.EntityHitResult;
 import net.minecraft.world.phys.HitResult;
 import net.minecraft.world.phys.Vec3;
 
@@ -66,7 +67,17 @@ public abstract class ThrowableProjectile extends Projectile {
         }
 
         if (movingobjectposition.getType() != HitResult.Type.MISS && !flag) {
+            // Paper start - Call ProjectileCollideEvent
+            if (movingobjectposition instanceof EntityHitResult) {
+                com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callProjectileCollideEvent(this, (EntityHitResult)movingobjectposition);
+                if (event.isCancelled()) {
+                    movingobjectposition = null;
+                }
+            }
+            if (movingobjectposition != null) {
+            // Paper end
             this.preOnHit(movingobjectposition); // CraftBukkit - projectile hit event
+            } // Paper
         }
 
         this.checkInsideBlocks();
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index ed3014b2c8d3c182c0011a5d970216b6f4c6afa5..fdf00487c7ff1fb1058a28e63e535165b26fc34a 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -1253,6 +1253,16 @@ public class CraftEventFactory {
         return CraftItemStack.asNMSCopy(bitem);
     }
 
+    // Paper start
+    public static com.destroystokyo.paper.event.entity.ProjectileCollideEvent callProjectileCollideEvent(Entity entity, EntityHitResult position) {
+        Projectile projectile = (Projectile) entity.getBukkitEntity();
+        org.bukkit.entity.Entity collided = position.getEntity().getBukkitEntity();
+        com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = new com.destroystokyo.paper.event.entity.ProjectileCollideEvent(projectile, collided);
+        Bukkit.getPluginManager().callEvent(event);
+        return event;
+    }
+    // Paper end
+
     public static ProjectileLaunchEvent callProjectileLaunchEvent(Entity entity) {
         Projectile bukkitEntity = (Projectile) entity.getBukkitEntity();
         ProjectileLaunchEvent event = new ProjectileLaunchEvent(bukkitEntity);