Overhauled the tool system. All tools can now be bound to any held item so you can have multiple tools out a time. New masks framework allows making a filter of blocks to change. Brushes are now powerful as well.

src/com/sk89q/worldedit/tools/SinglePickaxe.java

@@ -0,0 +1,52 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldedit.tools;
+
+import com.sk89q.worldedit.*;
+import com.sk89q.worldedit.blocks.BlockID;
+
+/**
+ * A super pickaxe mode that removes one block.
+ * 
+ * @author sk89q
+ */
+public class SinglePickaxe implements BlockTool {
+    @Override
+    public boolean act(ServerInterface server, LocalConfiguration config,
+            LocalPlayer player, LocalSession session, WorldVector clicked) {
+        LocalWorld world = clicked.getWorld();
+        
+        if (world.getBlockType(clicked) == BlockID.BEDROCK
+                && !player.canDestroyBedrock()) {
+            return true;
+        } else if (world.getBlockType(clicked) == BlockID.TNT) {
+            return false;
+        }
+
+        if (config.superPickaxeDrop) {
+            world.simulateBlockMine(clicked);
+        }
+        
+        world.setBlockType(clicked, 0);
+        
+        return true;
+    }
+
+}