Paper/patches/unapplied/server/0560-Climbing-should-not-bypass-cramming-gamerule.patch

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/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index e1aa521a3947b38643866e038c7d0536658c58f2..a6cfc237fe5e06d43732dcd76b3a52a886ae8fe3 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -93,6 +93,11 @@ public class PaperWorldConfig {
         wanderingTraderSpawnChanceMax = getInt("wandering-trader.spawn-chance-max", wanderingTraderSpawnChanceMax);
     }
 
+    public boolean fixClimbingBypassingCrammingRule = false;
+    private void fixClimbingBypassingCrammingRule() {
+        fixClimbingBypassingCrammingRule = getBoolean("fix-climbing-bypassing-cramming-rule", fixClimbingBypassingCrammingRule);
+    }
+
     public short keepLoadedRange;
     private void keepLoadedRange() {
         keepLoadedRange = (short) (getInt("keep-spawn-loaded-range", Math.min(spigotConfig.viewDistance, 10)) * 16);
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 368c80ac596b66396985521e6e8c6aee6af26697..7e0f711ded0ecf0b94a79f69a3d75c2afa57c5a9 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -1749,6 +1749,12 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
     }
 
     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 8fb89326395a7e70982c0d757b506565e98b12a4..a060cca08631fb42041e3a79a9abc422fe7757af 100644
--- a/src/main/java/net/minecraft/world/entity/EntitySelector.java
+++ b/src/main/java/net/minecraft/world/entity/EntitySelector.java
@@ -44,11 +44,17 @@ 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
         Team scoreboardteambase = entity.getTeam();
         Team.CollisionRule scoreboardteambase_enumteampush = scoreboardteambase == null ? Team.CollisionRule.ALWAYS : scoreboardteambase.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 40964014376aa911f412f6a5b717c6cf523530ab..327199d0e002bb7e7c2194fb54c213e837dd8dd8 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3277,7 +3277,7 @@ public abstract class LivingEntity extends Entity {
             return;
         }
         // Paper end - don't run getEntities if we're not going to use its result
-        List<Entity> list = this.level.getEntities(this, this.getBoundingBox(), EntitySelector.pushableBy(this));
+        List<Entity> list = this.level.getEntities(this, this.getBoundingBox(), EntitySelector.pushable(this, level.paperConfig.fixClimbingBypassingCrammingRule)); // Paper - fix climbing bypassing cramming rule
 
         if (!list.isEmpty()) {
             // Paper - move up
@@ -3444,9 +3444,16 @@ public abstract class LivingEntity extends Entity {
         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(level.paperConfig.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 ee55623cddc6d9e0dde5f384d66a750b92cc4f0e..9ed2f8f2843c634fd14dda4459f85b7140dd447a 100644
--- a/src/main/java/net/minecraft/world/entity/ambient/Bat.java
+++ b/src/main/java/net/minecraft/world/entity/ambient/Bat.java
@@ -83,7 +83,7 @@ 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 57378e42d6ef1be70a0abcca846cab9108c76783..ae21d260b2d4673eb4aa56a82e1043d20507adb2 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Parrot.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Parrot.java
@@ -380,8 +380,8 @@ public class Parrot extends ShoulderRidingEntity implements FlyingAnimal {
     }
 
     @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 c613a5e4d3ae360ce3eed312c5eecc553fae0066..630b6491ee186e1e3f17489311a91681e52b7ff5 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
@@ -239,7 +239,7 @@ 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 c5e9273055ff7302941b7475d8175be53eaece1f..02bce120fc93caa9e1e92b61e74c28209a1b2385 100644
--- a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
@@ -345,7 +345,7 @@ 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 fa889f93a5c6782957bdbf803915cb5e80e05f3e..9653b142c199c068e4d6175bcd3cbecb6465853f 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java
@@ -149,7 +149,7 @@ public abstract class AbstractMinecart extends Entity {
     }
 
     @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 3f1059569da23bd02c00279050bf7bce7a160462..a1b93f2878e22fa1d0cad639416d2dc5b8339c73 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/Boat.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/Boat.java
@@ -158,7 +158,7 @@ public class Boat extends Entity {
     }
 
     @Override
-    public boolean isPushable() {
+    public boolean isCollidable(boolean ignoreClimbing) { // Paper
         return true;
     }