PaperMC/paper-server/nms-patches/net/minecraft/world/entity/vehicle/EntityBoat.patch

--- a/net/minecraft/world/entity/vehicle/EntityBoat.java
+++ b/net/minecraft/world/entity/vehicle/EntityBoat.java
@@ -55,6 +55,16 @@
 import net.minecraft.world.phys.shapes.VoxelShapes;
 import org.joml.Vector3f;
 
+// CraftBukkit start
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.util.CraftLocation;
+import org.bukkit.entity.Vehicle;
+import org.bukkit.event.vehicle.VehicleDamageEvent;
+import org.bukkit.event.vehicle.VehicleDestroyEvent;
+import org.bukkit.event.vehicle.VehicleEntityCollisionEvent;
+import org.bukkit.event.vehicle.VehicleMoveEvent;
+// CraftBukkit end
+
 public class EntityBoat extends Entity implements VariantHolder<EntityBoat.EnumBoatType> {
 
     private static final DataWatcherObject<Integer> DATA_ID_HURT = DataWatcher.defineId(EntityBoat.class, DataWatcherRegistry.INT);
@@ -95,6 +105,14 @@
     private float bubbleAngle;
     private float bubbleAngleO;
 
+    // CraftBukkit start
+    // PAIL: Some of these haven't worked since a few updates, and since 1.9 they are less and less applicable.
+    public double maxSpeed = 0.4D;
+    public double occupiedDeceleration = 0.2D;
+    public double unoccupiedDeceleration = -1;
+    public boolean landBoats = false;
+    // CraftBukkit end
+
     public EntityBoat(EntityTypes<? extends EntityBoat> entitytypes, World world) {
         super(entitytypes, world);
         this.paddlePositions = new float[2];
@@ -180,6 +198,19 @@
         if (this.isInvulnerableTo(damagesource)) {
             return false;
         } else if (!this.level().isClientSide && !this.isRemoved()) {
+            // CraftBukkit start
+            Vehicle vehicle = (Vehicle) this.getBukkitEntity();
+            org.bukkit.entity.Entity attacker = (damagesource.getEntity() == null) ? null : damagesource.getEntity().getBukkitEntity();
+
+            VehicleDamageEvent event = new VehicleDamageEvent(vehicle, attacker, (double) f);
+            this.level().getCraftServer().getPluginManager().callEvent(event);
+
+            if (event.isCancelled()) {
+                return false;
+            }
+            // f = event.getDamage(); // TODO Why don't we do this?
+            // CraftBukkit end
+
             this.setHurtDir(-this.getHurtDir());
             this.setHurtTime(10);
             this.setDamage(this.getDamage() + f * 10.0F);
@@ -188,6 +219,15 @@
             boolean flag = damagesource.getEntity() instanceof EntityHuman && ((EntityHuman) damagesource.getEntity()).getAbilities().instabuild;
 
             if (flag || this.getDamage() > 40.0F) {
+                // CraftBukkit start
+                VehicleDestroyEvent destroyEvent = new VehicleDestroyEvent(vehicle, attacker);
+                this.level().getCraftServer().getPluginManager().callEvent(destroyEvent);
+
+                if (destroyEvent.isCancelled()) {
+                    this.setDamage(40F); // Maximize damage so this doesn't get triggered again right away
+                    return true;
+                }
+                // CraftBukkit end
                 if (!flag && this.level().getGameRules().getBoolean(GameRules.RULE_DOENTITYDROPS)) {
                     this.destroy(damagesource);
                 }
@@ -227,9 +267,29 @@
     public void push(Entity entity) {
         if (entity instanceof EntityBoat) {
             if (entity.getBoundingBox().minY < this.getBoundingBox().maxY) {
+                // CraftBukkit start
+                if (!this.isPassengerOfSameVehicle(entity)) {
+                    VehicleEntityCollisionEvent event = new VehicleEntityCollisionEvent((Vehicle) this.getBukkitEntity(), entity.getBukkitEntity());
+                    this.level().getCraftServer().getPluginManager().callEvent(event);
+
+                    if (event.isCancelled()) {
+                        return;
+                    }
+                }
+                // CraftBukkit end
                 super.push(entity);
             }
         } else if (entity.getBoundingBox().minY <= this.getBoundingBox().minY) {
+            // CraftBukkit start
+            if (!this.isPassengerOfSameVehicle(entity)) {
+                VehicleEntityCollisionEvent event = new VehicleEntityCollisionEvent((Vehicle) this.getBukkitEntity(), entity.getBukkitEntity());
+                this.level().getCraftServer().getPluginManager().callEvent(event);
+
+                if (event.isCancelled()) {
+                    return;
+                }
+            }
+            // CraftBukkit end
             super.push(entity);
         }
 
@@ -322,6 +382,7 @@
         return this.getDirection().getClockWise();
     }
 
+    private Location lastLocation; // CraftBukkit
     @Override
     public void tick() {
         this.oldStatus = this.status;
@@ -362,6 +423,22 @@
             this.setDeltaMovement(Vec3D.ZERO);
         }
 
+        // CraftBukkit start
+        org.bukkit.Server server = this.level().getCraftServer();
+        org.bukkit.World bworld = this.level().getWorld();
+
+        Location to = CraftLocation.toBukkit(this.position(), bworld, this.getYRot(), this.getXRot());
+        Vehicle vehicle = (Vehicle) this.getBukkitEntity();
+
+        server.getPluginManager().callEvent(new org.bukkit.event.vehicle.VehicleUpdateEvent(vehicle));
+
+        if (lastLocation != null && !lastLocation.equals(to)) {
+            VehicleMoveEvent event = new VehicleMoveEvent(vehicle, lastLocation, to);
+            server.getPluginManager().callEvent(event);
+        }
+        lastLocation = vehicle.getLocation();
+        // CraftBukkit end
+
         this.tickBubbleColumn();
 
         for (int i = 0; i <= 1; ++i) {
@@ -845,6 +922,11 @@
 
                     this.causeFallDamage(this.fallDistance, 1.0F, this.damageSources().fall());
                     if (!this.level().isClientSide && !this.isRemoved()) {
+                    // CraftBukkit start
+                    Vehicle vehicle = (Vehicle) this.getBukkitEntity();
+                    VehicleDestroyEvent destroyEvent = new VehicleDestroyEvent(vehicle, null);
+                    this.level().getCraftServer().getPluginManager().callEvent(destroyEvent);
+                    if (!destroyEvent.isCancelled()) {
                         this.kill();
                         if (this.level().getGameRules().getBoolean(GameRules.RULE_DOENTITYDROPS)) {
                             int i;
@@ -858,6 +940,7 @@
                             }
                         }
                     }
+                    } // CraftBukkit end
                 }
 
                 this.resetFallDistance();