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 41c14d367e0b51e109001167d3c7b40676f364b8..505ba8e298a825ce69cc60c76cb040edeb0acdbd 100644 --- a/src/main/java/net/minecraft/server/Entity.java +++ b/src/main/java/net/minecraft/server/Entity.java @@ -1948,12 +1948,15 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke } - public void bb() { + // Paper start + public void bb() { 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 } } @@ -2008,7 +2011,10 @@ 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 { @@ -2018,7 +2024,7 @@ 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(); @@ -2029,7 +2035,7 @@ 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 afc665bfe9d527ca8d19f3ab9df0900d87f2d3f2..7916421fe1dd8eadfd1c9bd15c4bbbb7331faca6 100644 --- a/src/main/java/net/minecraft/server/EntityHuman.java +++ b/src/main/java/net/minecraft/server/EntityHuman.java @@ -942,9 +942,11 @@ public abstract class EntityHuman extends EntityLiving { return -0.35D; } - @Override - public void bb() { - super.bb(); + // Paper start + @Override public void bb() { 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 d6a98bb7fc107649c179cded2d37c06a41146a89..84de18a6c207612ec3d3cca61749934b1d421155 100644 --- a/src/main/java/net/minecraft/server/EntityLiving.java +++ b/src/main/java/net/minecraft/server/EntityLiving.java @@ -2892,11 +2892,13 @@ public abstract class EntityLiving extends Entity { return ((Byte) this.datawatcher.get(EntityLiving.an) & 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 4b1923c81df02d0d48a5e61b9e4487d4a2fe789b..76eff7dcb734f366b515d13a4a693adaa23695ad 100644 --- a/src/main/java/net/minecraft/server/EntityPlayer.java +++ b/src/main/java/net/minecraft/server/EntityPlayer.java @@ -1134,11 +1134,13 @@ 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) {