From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Shane Freeder Date: Thu, 15 Nov 2018 13:38:37 +0000 Subject: [PATCH] force entity dismount during teleportation Entities must be dismounted before teleportation in order to avoid multiple issues in the server with regards to teleportation, shamefully, too many plugins rely on the events firing, which means that not firing these events caues more issues than it solves; In order to counteract this, Entity dismount/exit vehicle events have been modified to supress cancellation (and has a method to allow plugins to check if this has been set), noting that cancellation will be silently surpressed given that plugins are not expecting this event to not be cancellable. This is a far from ideal scenario, however: given the current state of this event and other alternatives causing issues elsewhere, I believe that this is going to be the best soultion all around. Improvements/suggestions welcome! diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java index ce0eadbae95a9f6b4e5a46a9d0ee1ccf69c6779a..3d44188e68df31d188f25820000e2c39aa5b6ce0 100644 --- a/src/main/java/net/minecraft/server/Entity.java +++ b/src/main/java/net/minecraft/server/Entity.java @@ -2033,12 +2033,15 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke } - public void stopRiding() { + // Paper start + public void stopRiding() { stopRiding(false); } + public void stopRiding(boolean suppressCancellation) { + // Paper end if (this.vehicle != null) { Entity entity = this.vehicle; this.vehicle = null; - if (!entity.removePassenger(this)) this.vehicle = entity; // CraftBukkit + if (!entity.removePassenger(this, suppressCancellation)) this.vehicle = entity; // CraftBukkit // Paper } } @@ -2089,7 +2092,10 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke return true; // CraftBukkit } - protected boolean removePassenger(Entity entity) { // CraftBukkit + // Paper start + protected boolean removePassenger(Entity entity) { return removePassenger(entity, false);} + protected boolean removePassenger(Entity entity, boolean suppressCancellation) { // CraftBukkit + // Paper end if (entity.getVehicle() == this) { throw new IllegalStateException("Use x.stopRiding(y), not y.removePassenger(x)"); } else { @@ -2099,7 +2105,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke if (getBukkitEntity() instanceof Vehicle && entity.getBukkitEntity() instanceof LivingEntity) { VehicleExitEvent event = new VehicleExitEvent( (Vehicle) getBukkitEntity(), - (LivingEntity) entity.getBukkitEntity() + (LivingEntity) entity.getBukkitEntity(), !suppressCancellation // Paper ); Bukkit.getPluginManager().callEvent(event); CraftEntity craftn = (CraftEntity) entity.getBukkitEntity().getVehicle(); @@ -2110,7 +2116,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke } // CraftBukkit end // Spigot start - org.spigotmc.event.entity.EntityDismountEvent event = new org.spigotmc.event.entity.EntityDismountEvent(entity.getBukkitEntity(), this.getBukkitEntity()); + org.spigotmc.event.entity.EntityDismountEvent event = new org.spigotmc.event.entity.EntityDismountEvent(entity.getBukkitEntity(), this.getBukkitEntity(), !suppressCancellation); // Paper Bukkit.getPluginManager().callEvent(event); if (event.isCancelled()) { return false; diff --git a/src/main/java/net/minecraft/server/EntityHuman.java b/src/main/java/net/minecraft/server/EntityHuman.java index f41975165a6a66479bc8fc1811c1d271bb2a6113..61c9e030a105ee78a7e59fbf36cf7a77f87a0e88 100644 --- a/src/main/java/net/minecraft/server/EntityHuman.java +++ b/src/main/java/net/minecraft/server/EntityHuman.java @@ -968,9 +968,11 @@ public abstract class EntityHuman extends EntityLiving { return -0.35D; } - @Override - public void stopRiding() { - super.stopRiding(); + // Paper start + @Override public void stopRiding() { stopRiding(false); } + @Override public void stopRiding(boolean suppressCancellation) { + // Paper end + super.stopRiding(suppressCancellation); // Paper - suppress this.j = 0; } diff --git a/src/main/java/net/minecraft/server/EntityLiving.java b/src/main/java/net/minecraft/server/EntityLiving.java index 3d5668271954ede03220354985851603669a61d4..c7c248f63f8cfef6d6b095a926028c519ec3ffd4 100644 --- a/src/main/java/net/minecraft/server/EntityLiving.java +++ b/src/main/java/net/minecraft/server/EntityLiving.java @@ -2738,11 +2738,13 @@ public abstract class EntityLiving extends Entity { return ((Byte) this.datawatcher.get(EntityLiving.ao) & 4) != 0; } - @Override - public void stopRiding() { + // Paper start + @Override public void stopRiding() { stopRiding(false); } + @Override public void stopRiding(boolean suppressCancellation) { + // Paper end Entity entity = this.getVehicle(); - super.stopRiding(); + super.stopRiding(suppressCancellation); // Paper - suppress if (entity != null && entity != this.getVehicle() && !this.world.isClientSide) { this.a(entity); } diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java index cf71ad016a028a539e3d7155ad44408ac851473e..960e1fd4ad33ffc9d2baa302a407f9ad94d9a7ce 100644 --- a/src/main/java/net/minecraft/server/EntityPlayer.java +++ b/src/main/java/net/minecraft/server/EntityPlayer.java @@ -1023,11 +1023,13 @@ public class EntityPlayer extends EntityHuman implements ICrafting { } } - @Override - public void stopRiding() { + // Paper start + @Override public void stopRiding() { stopRiding(false); } + @Override public void stopRiding(boolean suppressCancellation) { + // paper end Entity entity = this.getVehicle(); - super.stopRiding(); + super.stopRiding(suppressCancellation); // Paper Entity entity1 = this.getVehicle(); if (entity1 != entity && this.playerConnection != null) {