From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Mon, 13 Apr 2020 07:31:44 +0100
Subject: [PATCH] Prevent opening inventories when frozen


diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java
index dad115496d3210e1471f1c4eb81989c27a8eb368..6ab11c9b5b6139d917cf1b69430173f0222c6c8b 100644
--- a/src/main/java/net/minecraft/server/EntityPlayer.java
+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
@@ -423,7 +423,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
             containerUpdateDelay = world.paperConfig.containerUpdateTickRate;
         }
         // Paper end
-        if (!this.world.isClientSide && !this.activeContainer.canUse(this)) {
+        if (!this.world.isClientSide && this.activeContainer != this.defaultContainer && (isFrozen() || !this.activeContainer.canUse(this))) { // Paper - auto close while frozen
             this.closeInventory(org.bukkit.event.inventory.InventoryCloseEvent.Reason.CANT_USE); // Paper
             this.activeContainer = this.defaultContainer;
         }
@@ -1279,7 +1279,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
             } else {
                 // CraftBukkit start
                 this.activeContainer = container;
-                this.playerConnection.sendPacket(new PacketPlayOutOpenWindow(container.windowId, container.getType(), container.getTitle()));
+                if (!isFrozen()) this.playerConnection.sendPacket(new PacketPlayOutOpenWindow(container.windowId, container.getType(), container.getTitle())); // Paper
                 // CraftBukkit end
                 container.addSlotListener(this);
                 return OptionalInt.of(this.containerCounter);
@@ -2074,7 +2074,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
     }
 
     @Override
-    protected boolean isFrozen() {
+    public boolean isFrozen() { // Paper - protected > public
         return super.isFrozen() || (this.playerConnection != null && this.playerConnection.isDisconnected()); // Paper
     }
 
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java
index f6209e9c0b9e0ab99693025d23847bc62a06225d..1c271ee568a02f1ab9c8722b840444f5cf5d657f 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java
@@ -318,7 +318,7 @@ public class CraftHumanEntity extends CraftLivingEntity implements HumanEntity {
 
         String title = container.getBukkitView().getTitle();
 
-        player.playerConnection.sendPacket(new PacketPlayOutOpenWindow(container.windowId, windowType, CraftChatMessage.fromString(title)[0]));
+        if (!player.isFrozen()) player.playerConnection.sendPacket(new PacketPlayOutOpenWindow(container.windowId, windowType, CraftChatMessage.fromString(title)[0])); // Paper
         getHandle().activeContainer = container;
         getHandle().activeContainer.addSlotListener(player);
     }
@@ -388,7 +388,7 @@ public class CraftHumanEntity extends CraftLivingEntity implements HumanEntity {
         // Now open the window
         Containers<?> windowType = CraftContainer.getNotchInventoryType(inventory.getTopInventory());
         String title = inventory.getTitle();
-        player.playerConnection.sendPacket(new PacketPlayOutOpenWindow(container.windowId, windowType, CraftChatMessage.fromString(title)[0]));
+        if (!player.isFrozen()) player.playerConnection.sendPacket(new PacketPlayOutOpenWindow(container.windowId, windowType, CraftChatMessage.fromString(title)[0])); // Paper
         player.activeContainer = container;
         player.activeContainer.addSlotListener(player);
     }