From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Sun, 23 Aug 2020 20:59:00 +0200
Subject: [PATCH] Climbing should not bypass cramming gamerule


diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index f0158217eceeaf73555a741957324ce0258fa6b2..90621d3dfe8660f9b389ed292a3582a5dbb726bd 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -2062,6 +2062,12 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
     }
 
     public boolean isPushable() {
+        // Paper start
+        return isCollidable(false);
+    }
+
+    public boolean isCollidable(boolean ignoreClimbing) {
+        // Paper end
         return false;
     }
 
diff --git a/src/main/java/net/minecraft/world/entity/EntitySelector.java b/src/main/java/net/minecraft/world/entity/EntitySelector.java
index 68e4440765636295a74ea942862d772d47282ad6..93a41156a01a1638f3ef469b1518a07e7961f378 100644
--- a/src/main/java/net/minecraft/world/entity/EntitySelector.java
+++ b/src/main/java/net/minecraft/world/entity/EntitySelector.java
@@ -46,11 +46,16 @@ public final class EntitySelector {
     }
 
     public static Predicate<Entity> pushableBy(Entity entity) {
+        // Paper start - ignoreClimbing param
+        return pushable(entity, false);
+    }
+    public static Predicate<Entity> pushable(Entity entity, boolean ignoreClimbing) {
+        // Paper end
         PlayerTeam scoreboardteam = entity.getTeam();
         Team.CollisionRule scoreboardteambase_enumteampush = scoreboardteam == null ? Team.CollisionRule.ALWAYS : scoreboardteam.getCollisionRule();
 
         return (Predicate) (scoreboardteambase_enumteampush == Team.CollisionRule.NEVER ? Predicates.alwaysFalse() : EntitySelector.NO_SPECTATORS.and((entity1) -> {
-            if (!entity1.canCollideWithBukkit(entity) || !entity.canCollideWithBukkit(entity1)) { // CraftBukkit - collidable API
+            if (!entity1.isCollidable(ignoreClimbing) || !entity1.canCollideWithBukkit(entity) || !entity.canCollideWithBukkit(entity1)) { // CraftBukkit - collidable API // Paper - isCollidable
                 return false;
             } else if (entity.level().isClientSide && (!(entity1 instanceof Player) || !((Player) entity1).isLocalPlayer())) {
                 return false;
diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index 90c66f87e721ef34bf3f47b601456fece3064225..bf617621c88c68198709d1ed238622c3fcec89bd 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3426,7 +3426,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
                 return;
             }
             // Paper end - don't run getEntities if we're not going to use its result
-            List<Entity> list = this.level().getEntities((Entity) this, this.getBoundingBox(), EntitySelector.pushableBy(this));
+            List<Entity> list = this.level().getEntities((Entity) this, this.getBoundingBox(), EntitySelector.pushable(this, this.level().paperConfig().collisions.fixClimbingBypassingCrammingRule)); // Paper - fix climbing bypassing cramming rule
 
             if (!list.isEmpty()) {
                 // Paper - moved up
@@ -3616,9 +3616,16 @@ public abstract class LivingEntity extends Entity implements Attackable {
         return !this.isRemoved() && this.collides; // CraftBukkit
     }
 
+    // Paper start
     @Override
     public boolean isPushable() {
-        return this.isAlive() && !this.isSpectator() && !this.onClimbable() && this.collides; // CraftBukkit
+        return this.isCollidable(this.level().paperConfig().collisions.fixClimbingBypassingCrammingRule);
+    }
+
+    @Override
+    public boolean isCollidable(boolean ignoreClimbing) {
+        return this.isAlive() && !this.isSpectator() && (ignoreClimbing || !this.onClimbable()) && this.collides; // CraftBukkit
+        // Paper end
     }
 
     // CraftBukkit start - collidable API
diff --git a/src/main/java/net/minecraft/world/entity/ambient/Bat.java b/src/main/java/net/minecraft/world/entity/ambient/Bat.java
index bc9a710a92662b1f69b0f5b289780fe0a0d5ed32..6b614818b14ecfc8fc82b523eeb7e21fdf9bf1ba 100644
--- a/src/main/java/net/minecraft/world/entity/ambient/Bat.java
+++ b/src/main/java/net/minecraft/world/entity/ambient/Bat.java
@@ -90,7 +90,7 @@ public class Bat extends AmbientCreature {
     }
 
     @Override
-    public boolean isPushable() {
+    public boolean isCollidable(boolean ignoreClimbing) { // Paper
         return false;
     }
 
diff --git a/src/main/java/net/minecraft/world/entity/animal/Parrot.java b/src/main/java/net/minecraft/world/entity/animal/Parrot.java
index fbad0e512b990c3d6885ecf92766ba6fd851cc20..4c34edc55fa0e136ccf49a3aef001f413274dfac 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Parrot.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Parrot.java
@@ -383,8 +383,8 @@ public class Parrot extends ShoulderRidingEntity implements VariantHolder<Parrot
     }
 
     @Override
-    public boolean isPushable() {
-        return super.isPushable(); // CraftBukkit - collidable API
+    public boolean isCollidable(boolean ignoreClimbing) { // Paper
+        return super.isCollidable(ignoreClimbing); // CraftBukkit - collidable API // Paper
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java b/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java
index 6b7453281e32aae20778f26b4098df418401c45b..a13a1725356ca4430f1f0a6d121fc08679de62db 100644
--- a/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java
+++ b/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java
@@ -286,7 +286,7 @@ public abstract class AbstractHorse extends Animal implements ContainerListener,
     }
 
     @Override
-    public boolean isPushable() {
+    public boolean isCollidable(boolean ignoreClimbing) { // Paper
         return !this.isVehicle();
     }
 
diff --git a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
index 17b6649a7e36fc9322f857e83551d8a99f4f288d..483d8c627a60e04f66f0135a8d64e6d5366e0997 100644
--- a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
@@ -343,7 +343,7 @@ public class ArmorStand extends LivingEntity {
     }
 
     @Override
-    public boolean isPushable() {
+    public boolean isCollidable(boolean ignoreClimbing) { // Paper
         return false;
     }
 
diff --git a/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java b/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java
index b09c4e2a36f653ff6aa0e2c0bc927a8fd7e41ae0..bf9963eb59269223a9e322773f3543640645ae9f 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java
@@ -172,7 +172,7 @@ public abstract class AbstractMinecart extends VehicleEntity {
     }
 
     @Override
-    public boolean isPushable() {
+    public boolean isCollidable(boolean ignoreClimbing) { // Paper
         return true;
     }
 
diff --git a/src/main/java/net/minecraft/world/entity/vehicle/Boat.java b/src/main/java/net/minecraft/world/entity/vehicle/Boat.java
index e6a7bf9a27fb66d8c2210678dbe8afa8bbf5e7c8..6b0ec9da5a368775924f5b97c74acc5bfd609fa1 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/Boat.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/Boat.java
@@ -157,7 +157,7 @@ public class Boat extends VehicleEntity implements VariantHolder<Boat.Type> {
     }
 
     @Override
-    public boolean isPushable() {
+    public boolean isCollidable(boolean ignoreClimbing) { // Paper
         return true;
     }