Keep Blocks updated when changed by the world

src/net/minecraft/server/WorldServer.java

@@ -0,0 +1,116 @@
+package net.minecraft.server;
+
+
+import java.io.File;
+import java.util.*;
+import org.bukkit.craftbukkit.CraftWorld;
+
+
+public class WorldServer extends World {
+
+    public ChunkProviderServer A;
+    public boolean B;
+    public boolean C;
+    private MinecraftServer D;
+    private MCHashTable E;
+    private final CraftWorld world; // CraftBukkit
+
+    public WorldServer(MinecraftServer minecraftserver, File file, String s, int i) {
+        super(file, s, (new Random()).nextLong(), WorldProvider.a(i));
+        B = false;
+        E = new MCHashTable();
+        D = minecraftserver;
+        world = (CraftWorld)D.server.getWorld(this); // CraftBukkit
+    }
+
+    // CraftBukkit start
+    @Override
+    public boolean c(int i1, int j1, int k1, int l1) {
+        boolean result = super.c(i1, j1, k1, l1);
+        world.updateBlock(i1, j1, k1);
+        return result;
+    }
+
+    @Override
+    public boolean d(int i1, int j1, int k1, int l1) {
+        boolean result = super.d(i1, j1, k1, l1);
+        world.updateBlock(i1, j1, k1);
+        return result;
+    }
+    // CraftBukkit stop
+
+    public void f() {
+        super.f();
+    }
+
+    public void a(Entity entity, boolean flag) {
+        if (!D.m && (entity instanceof EntityAnimals)) {
+            entity.l();
+        }
+        if (entity.j == null || !(entity.j instanceof EntityPlayer)) {
+            super.a(entity, flag);
+        }
+    }
+
+    public void b(Entity entity, boolean flag) {
+        super.a(entity, flag);
+    }
+
+    protected IChunkProvider a(File file) {
+        A = new ChunkProviderServer(this, q.a(file), q.c());
+        return A;
+    }
+
+    public List d(int i, int j, int k, int l, int i1, int j1) {
+        ArrayList arraylist = new ArrayList();
+
+        for (int k1 = 0; k1 < c.size(); k1++) {
+            TileEntity tileentity = (TileEntity) c.get(k1);
+
+            if (tileentity.b >= i && tileentity.c >= j && tileentity.d >= k && tileentity.b < l && tileentity.c < i1 && tileentity.d < j1) {
+                arraylist.add(tileentity);
+            }
+        }
+
+        return arraylist;
+    }
+
+    public boolean a(EntityPlayer entityplayer, int i, int j, int k) {
+        int l = (int) MathHelper.e(i - m);
+        int i1 = (int) MathHelper.e(k - o);
+
+        if (l > i1) {
+            i1 = l;
+        }
+        return i1 > 16 || D.f.g(entityplayer.aw);
+    }
+
+    protected void b(Entity entity) {
+        super.b(entity);
+        E.a(entity.g, entity);
+    }
+
+    protected void c(Entity entity) {
+        super.c(entity);
+        E.d(entity.g);
+    }
+
+    public Entity a(int i) {
+        return (Entity) E.a(i);
+    }
+
+    public void a(Entity entity, byte byte0) {
+        Packet38 packet38 = new Packet38(entity.g, byte0);
+
+        D.k.b(entity, packet38);
+    }
+
+    public Explosion a(Entity entity, double d1, double d2, double d3,
+            float f1, boolean flag) {
+        Explosion explosion = super.a(entity, d1, d2, d3, f1, flag);
+
+        D.f.a(d1, d2, d3, 64D, new Packet60(d1, d2, d3, f1, explosion.g));
+        return explosion;
+    }
+}
+

src/org/bukkit/craftbukkit/CraftBlock.java

@@ -9,8 +9,8 @@ public class CraftBlock implements Block {
     private final int x;
     private final int y;
     private final int z;
-    private int type;
-    private byte data;
+    protected int type;
+    protected byte data;
 
     protected CraftBlock(final World world, final int x, final int y, final int z, final int type, final byte data) {
         this.world = world;

src/org/bukkit/craftbukkit/CraftWorld.java

@@ -49,6 +49,23 @@ public class CraftWorld implements World {
         throw new UnsupportedOperationException("Not supported yet.");
     }
 
+    public Block updateBlock(int x, int y, int z) {
+        BlockCoordinate loc = new BlockCoordinate(x, y, z);
+        CraftBlock block = (CraftBlock)blockCache.get(loc);
+        final int type = world.a(x, y, z);
+        final byte data = (byte)world.b(x, y, z);
+
+        if (block == null) {
+            block = new CraftBlock(this, x, y, z, type, data);
+            blockCache.put(loc, block);
+        } else {
+            block.type = type;
+            block.data = data;
+        }
+
+        return block;
+    }
+
     private final class ChunkCoordinate {
         public final int x;
         public final int z;