From 528bbbdcd896e67067bcf53b95cadb9dc0081ebf Mon Sep 17 00:00:00 2001
From: feildmaster <admin@feildmaster.com>
Date: Sun, 27 Jan 2013 09:13:06 -0600
Subject: Fix TileEntities and Blocks getting out of sync. Fixes BUKKIT-3501

Also fixes: BUKKIT-3477 and BUKKIT-3488

Minecraft likes to double check that tile entities get set after they
are placed, however we didn't set tile entities until after our event
was called. This caused the world to have multiple tile entities in a
single block location; to fix this we now set tile entities before
the event.
---
 src/main/java/net/minecraft/server/Chunk.java     | 9 +++------
 src/main/java/net/minecraft/server/ItemBlock.java | 5 ++++-
 src/main/java/net/minecraft/server/World.java     | 6 ++----
 3 files changed, 9 insertions(+), 11 deletions(-)

(limited to 'src/main/java/net/minecraft/server')

diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index 941a4c22..93c343e1 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -428,12 +428,9 @@ public class Chunk {
                 TileEntity tileentity;
 
                 if (l != 0) {
-                    if (!this.world.isStatic) {
-                        // CraftBukkit start - Don't "place" if we're processing the event
-                        if (!this.world.suppressPhysics) {
-                            Block.byId[l].onPlace(this.world, j2, j, k2);
-                        }
-                        // CraftBukkit end
+                    // CraftBukkit - Don't place while processing the BlockPlaceEvent, unless it's a BlockContainer
+                    if (!this.world.isStatic && (!this.world.callingPlaceEvent || (Block.byId[l] instanceof BlockContainer))) {
+                        Block.byId[l].onPlace(this.world, j2, j, k2);
                     }
 
                     if (Block.byId[l] instanceof BlockContainer) {
diff --git a/src/main/java/net/minecraft/server/ItemBlock.java b/src/main/java/net/minecraft/server/ItemBlock.java
index 85bdbed4..e6d54bb1 100644
--- a/src/main/java/net/minecraft/server/ItemBlock.java
+++ b/src/main/java/net/minecraft/server/ItemBlock.java
@@ -80,22 +80,25 @@ public class ItemBlock extends Item {
         org.bukkit.block.BlockState blockstate = org.bukkit.craftbukkit.block.CraftBlockState.getBlockState(world, x, y, z);
 
         world.suppressPhysics = true;
+        world.callingPlaceEvent = true;
         world.setRawTypeIdAndData(x, y, z, id, data);
 
         org.bukkit.event.block.BlockPlaceEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callBlockPlaceEvent(world, entityhuman, blockstate, x, y, z);
         if (event.isCancelled() || !event.canBuild()) {
             blockstate.update(true);
             world.suppressPhysics = false;
+            world.callingPlaceEvent = false;
             return false;
         }
 
         world.suppressPhysics = false;
+        world.callingPlaceEvent = false;
 
         int newId = world.getTypeId(x, y, z);
         int newData = world.getData(x, y, z);
 
         Block block = Block.byId[newId];
-        if (block != null) {
+        if (block != null && !(block instanceof BlockContainer)) { // Containers get placed automatically
             block.onPlace(world, x, y, z);
         }
 
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index e2fd0dfd..c3dc4a4e 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -45,6 +45,7 @@ public abstract class World implements IBlockAccess {
     protected float p;
     public int q = 0;
     public boolean suppressPhysics = false;
+    public boolean callingPlaceEvent = false; // CraftBukkit
     public int difficulty;
     public Random random = new Random();
     public WorldProvider worldProvider; // CraftBukkit - remove final
@@ -394,11 +395,8 @@ public abstract class World implements IBlockAccess {
     }
 
     public boolean setTypeId(int i, int j, int k, int l) {
-        // CraftBukkit start
-        int old = this.getTypeId(i, j, k);
         if (this.setRawTypeId(i, j, k, l)) {
-            this.update(i, j, k, l == 0 ? old : l);
-            // CraftBukkit end
+            this.update(i, j, k, l);
             return true;
         } else {
             return false;
-- 
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