Extend Player Interact to cover CommandBlocks (@Phoenix616)

Spigot-Server-Patches/Extend-Player-Interact-cancellation-to-GUIs.patch

@@ -1,20 +1,25 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: Shane Freeder <theboyetronic@gmail.com>
 Date: Sun, 11 Feb 2018 10:43:46 +0000
-Subject: [PATCH] Close Structure Window when PlayerInteractEvent is cancelled
+Subject: [PATCH] Extend Player Interact cancellation to GUIs
 
-This is opened on the client, and so we send a CloseWindow packet
+GUIs are opened on the client, meaning that the server cannot block them from opening,
+However, it is possible to close these GUIs from the server.
 
 diff --git a/src/main/java/net/minecraft/server/PlayerInteractManager.java b/src/main/java/net/minecraft/server/PlayerInteractManager.java
-index 5ec7f5819..08b1dc0b2 100644
+index 5ec7f5819..b1cdb2154 100644
 --- a/src/main/java/net/minecraft/server/PlayerInteractManager.java
 +++ b/src/main/java/net/minecraft/server/PlayerInteractManager.java
 @@ -0,0 +0,0 @@ public class PlayerInteractManager {
                      ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutBlockChange(world, bottom ? blockposition.up() : blockposition.down()));
                  } else if (blockdata.getBlock() instanceof BlockCake) {
                      ((EntityPlayer) entityhuman).getBukkitEntity().sendHealthUpdate(); // SPIGOT-1341 - reset health for cake
-+                } else if (blockdata.getBlock() instanceof BlockStructure) { // Paper - close Structure window when PIE is cancelled
-+                    ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutCloseWindow()); // Paper - close Structure window when PIE is cancelled
++                // Paper start - extend Player Interact cancellation to GUIs
++                } else if (blockdata.getBlock() instanceof BlockStructure) {
++                    ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutCloseWindow());
++                } else if (blockdata.getBlock() instanceof BlockCommand) {
++                    ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutCloseWindow());
++                // Paper end - extend Player Interact cancellation to GUIs
                  }
                  ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory(); // SPIGOT-2867
                  enuminteractionresult = (event.useItemInHand() != Event.Result.ALLOW) ? EnumInteractionResult.SUCCESS : EnumInteractionResult.PASS;