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] Extend Player Interact cancellation

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.

Flower pots are also not updated on the client when interaction is cancelled, this patch
also resolves this.

Update adjacent blocks of doors, double plants, pistons and beds
when cancelling interaction.

diff --git a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
index 26ce794cb8d089c03fab5dd0a0c910783d10b72e..b1a53093eb5b5f359eedb6c252cf6d0d1ae8e409 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
@@ -23,6 +23,7 @@ import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
 import net.minecraft.network.protocol.game.ClientboundBlockBreakAckPacket;
 import net.minecraft.network.protocol.game.ClientboundBlockUpdatePacket;
+import net.minecraft.network.protocol.game.ClientboundContainerClosePacket;
 import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket;
 import net.minecraft.network.protocol.game.ServerboundPlayerActionPacket;
 import net.minecraft.server.MinecraftServer;
@@ -180,6 +181,11 @@ public class ServerPlayerGameMode {
                 PlayerInteractEvent event = CraftEventFactory.callPlayerInteractEvent(this.player, Action.LEFT_CLICK_BLOCK, pos, direction, this.player.inventory.getSelected(), InteractionHand.MAIN_HAND);
                 if (event.isCancelled()) {
                     // Let the client know the block still exists
+                    // Paper start - brute force neighbor blocks for any attached blocks
+                    for (Direction dir : Direction.values()) {
+                        this.player.connection.send(new ClientboundBlockUpdatePacket(level, pos.relative(dir)));
+                    }
+                    // Paper end
                     this.player.connection.send(new ClientboundBlockUpdatePacket(this.level, pos));
                     // Update any tile entity data for this block
                     BlockEntity tileentity = this.level.getBlockEntity(pos);
@@ -484,6 +490,7 @@ public class ServerPlayerGameMode {
         interactItemStack = stack.copy();
 
         if (event.useInteractedBlock() == Event.Result.DENY) {
+
             // If we denied a door from opening, we need to send a correcting update to the client, as it already opened the door.
             if (iblockdata.getBlock() instanceof DoorBlock) {
                 boolean bottom = iblockdata.getValue(DoorBlock.HALF) == DoubleBlockHalf.LOWER;
@@ -496,7 +503,13 @@ public class ServerPlayerGameMode {
 
                 // send a correcting update to the client for the block above as well, this because of replaceable blocks (such as grass, sea grass etc)
                 player.connection.send(new ClientboundBlockUpdatePacket(world, blockposition.above()));
+            // Paper start  - extend Player Interact cancellation // TODO: consider merging this into the extracted method
+            } else if (iblockdata.getBlock() instanceof StructureBlock) {
+                player.connection.send(new ClientboundContainerClosePacket());
+            } else if (iblockdata.getBlock() instanceof CommandBlock) {
+                player.connection.send(new ClientboundContainerClosePacket());
             }
+            // Paper end - extend Player Interact cancellation
             player.getBukkitEntity().updateInventory(); // SPIGOT-2867
             enuminteractionresult = (event.useItemInHand() != Event.Result.ALLOW) ? InteractionResult.SUCCESS : InteractionResult.PASS;
         } else if (this.gameModeForPlayer == GameType.SPECTATOR) {