Fixed handling of double chests and cleaned WorldEditListener up a bit

src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java

@@ -27,6 +27,7 @@ import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.util.TreeGenerator;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockState;
+import org.bukkit.block.Chest;
 import org.bukkit.block.Furnace;
 import org.bukkit.block.CreatureSpawner;
 import org.bukkit.block.Sign;
@@ -388,6 +389,9 @@ public class BukkitWorld extends LocalWorld {
 
         org.bukkit.inventory.InventoryHolder chest = (org.bukkit.inventory.InventoryHolder) state;
         Inventory inven = chest.getInventory();
+        if (chest instanceof Chest) {
+            inven = ((Chest) chest).getBlockInventory();
+        }
         inven.clear();
         return true;
     }
@@ -697,6 +701,9 @@ public class BukkitWorld extends LocalWorld {
 
         org.bukkit.inventory.InventoryHolder container = (org.bukkit.inventory.InventoryHolder) state;
         Inventory inven = container.getInventory();
+        if (container instanceof Chest) {
+            inven = ((Chest) container).getBlockInventory();
+        }
         int size = inven.getSize();
         BaseItemStack[] contents = new BaseItemStack[size];
 
@@ -737,6 +744,9 @@ public class BukkitWorld extends LocalWorld {
 
         org.bukkit.inventory.InventoryHolder chest = (org.bukkit.inventory.InventoryHolder) state;
         Inventory inven = chest.getInventory();
+        if (chest instanceof Chest) {
+            inven = ((Chest) chest).getBlockInventory();
+        }
         int size = inven.getSize();
 
         for (int i = 0; i < size; ++i) {

src/main/java/com/sk89q/worldedit/bukkit/WorldEditListener.java

@@ -84,12 +84,8 @@ public class WorldEditListener implements Listener {
      *
      * @param event Relevant event details
      */
-    @EventHandler(priority = EventPriority.LOW)
+    @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
     public void onPlayerCommandPreprocess(PlayerCommandPreprocessEvent event) {
-        if (event.isCancelled()) {
-            return;
-        }
-
         String[] split = event.getMessage().split(" ");
 
         if (split.length > 0) {
@@ -181,12 +177,8 @@ public class WorldEditListener implements Listener {
         }
     }
 
-    @EventHandler
+    @EventHandler(ignoreCancelled = true)
     public void onPlayerChat(PlayerChatEvent event) {
-        if (event.isCancelled()) {
-            return;
-        }
-        
         Matcher matcher = cuipattern.matcher(event.getMessage());
         if (matcher.find()) {
             String type = matcher.group(1);
@@ -196,7 +188,7 @@ public class WorldEditListener implements Listener {
                 try {
                     plugin.getSession(event.getPlayer()).setCUIVersion(Integer.parseInt(args));
                     event.setCancelled(true);
-                } catch( NumberFormatException e ) {
+                } catch(NumberFormatException ignore) {
                 }
             }