Paper/patches/server/0294-force-entity-dismount-during-teleportation.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
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/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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index db7f2715534ed71a2b285de095238586fe6a35b0..f51c416e7938b7905f7efb154ab14cad643962e9 100644
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--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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@@ -1323,11 +1323,13 @@ public class ServerPlayer extends Player {
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}
}
- @Override
- public void stopRiding() {
+ // Paper start
+ @Override public void stopRiding() { stopRiding(false); }
+ @Override public void stopRiding(boolean suppressCancellation) {
+ // Paper end
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Entity entity = this.getVehicle();
- super.stopRiding();
+ super.stopRiding(suppressCancellation); // Paper
Entity entity1 = this.getVehicle();
if (entity1 != entity && this.connection != null) {
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
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index 752e4593bed746e663f018f85ae1ac43cd7b0795..a1744b820a49cd4195b0e9ced960dc6bd2d58d45 100644
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--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
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@@ -2279,11 +2279,16 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, i
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}
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public void removeVehicle() {
+ // Paper start
+ stopRiding(false);
+ }
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+ public void stopRiding(boolean suppressCancellation) {
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+ // Paper end
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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
}
}
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@@ -2346,7 +2351,10 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, i
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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 {
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@@ -2356,7 +2364,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, i
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if (this.getBukkitEntity() instanceof Vehicle && entity.getBukkitEntity() instanceof LivingEntity) {
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VehicleExitEvent event = new VehicleExitEvent(
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(Vehicle) this.getBukkitEntity(),
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- (LivingEntity) entity.getBukkitEntity()
+ (LivingEntity) entity.getBukkitEntity(), !suppressCancellation // Paper
);
// Suppress during worldgen
if (this.valid) {
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@@ -2370,7 +2378,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, i
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}
// 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
// Suppress during worldgen
if (this.valid) {
Bukkit.getPluginManager().callEvent(event);
diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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index 5d47b536e89f192b10aa1434cd9cdccc49cd3eec..00900427e88f8e9118df4fb2e0e98c26b9f1b7d4 100644
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--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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@@ -3336,9 +3336,15 @@ public abstract class LivingEntity extends Entity {
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@Override
public void stopRiding() {
+ // Paper start
+ stopRiding(false);
+ }
+ @Override
+ public void stopRiding(boolean suppressCancellation) {
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+ // Paper end
Entity entity = this.getVehicle();
- super.stopRiding();
+ super.stopRiding(suppressCancellation); // Paper - suppress
if (entity != null && entity != this.getVehicle() && !this.level.isClientSide) {
this.dismountVehicle(entity);
}
diff --git a/src/main/java/net/minecraft/world/entity/player/Player.java b/src/main/java/net/minecraft/world/entity/player/Player.java
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index 37b65c7a12b4dc8ff4e9017015abbb86890dbf5e..6927eeb04a9aa1a33666f3655f2bb889bf046dc9 100644
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--- a/src/main/java/net/minecraft/world/entity/player/Player.java
+++ b/src/main/java/net/minecraft/world/entity/player/Player.java
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@@ -1094,7 +1094,13 @@ public abstract class Player extends LivingEntity {
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@Override
public void removeVehicle() {
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- super.removeVehicle();
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+ // Paper start
+ stopRiding(false);
+ }
+ @Override
+ public void stopRiding(boolean suppressCancellation) {
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+ // Paper end
+ super.stopRiding(suppressCancellation); // Paper - suppress
this.boardingCooldown = 0;
}