Reorganized code, made exceptions inherit from WorldEditException, added /setchangelimit.

src/EditSession.java

@@ -30,7 +30,32 @@ public class EditSession {
      * Stores the original blocks before modification.
      */
     private HashMap<Point<Integer>,Integer> original = new HashMap<Point<Integer>,Integer>();
+    /**
+     * Stores the current blocks.
+     */
     private HashMap<Point<Integer>,Integer> current = new HashMap<Point<Integer>,Integer>();
+    /**
+     * The maximum number of blocks to change at a time. If this number is
+     * exceeded, a MaxChangedBlocksException exception will be
+     * raised. -1 indicates no limit.
+     */
+    private int maxBlocks = -1;
+
+    /**
+     * Default constructor. There is no maximum blocks limit.
+     */
+    public EditSession() {
+    }
+
+    /**
+     * Construct the object with a maximum number of blocks.
+     */
+    public EditSession(int maxBlocks) {
+        if (maxBlocks < -1) {
+            throw new IllegalArgumentException("Max blocks must be >= -1");
+        }
+        this.maxBlocks = maxBlocks;
+    }
 
     /**
      * Sets a block without changing history.
@@ -54,10 +79,15 @@ public class EditSession {
      * @param blockType
      * @return Whether the block changed
      */
-    public boolean setBlock(int x, int y, int z, int blockType) {
+    public boolean setBlock(int x, int y, int z, int blockType)
+        throws MaxChangedBlocksException {
         Point<Integer> pt = new Point<Integer>(x, y, z);
         if (!original.containsKey(pt)) {
             original.put(pt, getBlock(x, y, z));
+
+            if (maxBlocks != -1 && original.size() > maxBlocks) {
+                throw new MaxChangedBlocksException(maxBlocks);
+            }
         }
         current.put(pt, blockType);
         return rawSetBlock(x, y, z, blockType);
@@ -104,4 +134,26 @@ public class EditSession {
     public int size() {
         return original.size();
     }
+
+    /**
+     * Get the maximum number of blocks that can be changed. -1 will be
+     * returned if disabled.
+     *
+     * @return
+     */
+    public int getBlockChangeLimit() {
+        return maxBlocks;
+    }
+
+    /**
+     * Set the maximum number of blocks that can be changed.
+     * 
+     * @param maxBlocks -1 to disable
+     */
+    public void setBlockChangeLimit(int maxBlocks) {
+        if (maxBlocks < -1) {
+            throw new IllegalArgumentException("Max blocks must be >= -1");
+        }
+        this.maxBlocks = maxBlocks;
+    }
 }

src/RegionClipboard.java

@@ -100,8 +100,10 @@ public class RegionClipboard {
      * @param editSession
      * @param origin Position to paste it from
      * @param noAir True to not paste air
+     * @throws MaxChangedBlocksException
      */
-    public void paste(EditSession editSession, Point<Integer> newOrigin, boolean noAir) {
+    public void paste(EditSession editSession, Point<Integer> newOrigin, boolean noAir)
+        throws MaxChangedBlocksException {
         int xs = getWidth();
         int ys = getHeight();
         int zs = getLength();

src/ScriptMinecraftContext.java

@@ -1,3 +1,6 @@
+
+import com.sk89q.worldedit.MaxChangedBlocksException;
+
 // $Id$
 /*
  * WorldEdit
@@ -40,9 +43,11 @@ public class ScriptMinecraftContext {
      * @param y
      * @param z
      * @param blockType
+     * @throws MaxChangedBlocksException
      * @return
      */
-    public boolean setBlock(int x, int y, int z, int blockType) {
+    public boolean setBlock(int x, int y, int z, int blockType)
+            throws MaxChangedBlocksException {
         return editSession.setBlock(x, y, z, blockType);
     }
 

src/WorldEdit.java

@@ -41,6 +41,7 @@ public class WorldEdit extends Plugin {
 
     private PropertiesFile properties;
     private String[] allowedBlocks;
+    private int defaultMaxBlocksChanged;
     private boolean mapScriptCommands = false;
 
     /**
@@ -68,6 +69,7 @@ public class WorldEdit extends Plugin {
         commands.put("/editsave", "[Filename] - Save clipboard to .schematic");
         commands.put("/editfill", "<ID> <Radius> <Depth> - Fill a hole");
         commands.put("/editscript", "[Filename] <Args...> - Run a WorldEdit script");
+        commands.put("/setchangelimit", "<Num> - See documentation");
     }
 
     /**
@@ -81,6 +83,7 @@ public class WorldEdit extends Plugin {
             return sessions.get(player.getName());
         } else {
             WorldEditSession session = new WorldEditSession();
+            session.setBlockChangeLimit(defaultMaxBlocksChanged);
             sessions.put(player.getName(), session);
             return session;
         }
@@ -169,6 +172,8 @@ public class WorldEdit extends Plugin {
 
         allowedBlocks = properties.getString("allowed-blocks", DEFAULT_ALLOWED_BLOCKS).split(",");
         mapScriptCommands = properties.getBoolean("map-script-commands", true);
+        defaultMaxBlocksChanged = 
+                Math.max(-1, properties.getInt("max-blocks-changed", -1));
 
         etc controller = etc.getInstance();
 
@@ -255,21 +260,33 @@ public class WorldEdit extends Plugin {
         try {
             if (commands.containsKey(split[0])) {
                 if (player.canUseCommand(split[0])) {
-                    return handleEditCommand(player, split);
+                    WorldEditSession session = getSession(player);
+                    EditSession editSession =
+                            new EditSession(session.getBlockChangeLimit());
+                    
+                    try {
+                        return performCommand(player, session, editSession, split);
+                    } finally {
+                        session.remember(editSession);
+                    }
                 }
             } else {
                 // See if there is a script by the same name
-                if (mapScriptCommands) {
-                    if (player.canUseCommand("/editscript")) {
-                        String filename = split[0].substring(1) + ".js";
-                        String[] args = new String[split.length - 1];
-                        System.arraycopy(split, 1, args, 0, split.length - 1);
-                        try {
-                            return runScript(player, getSession(player), new EditSession(),
-                                    filename, args);
-                        } catch (NoSuchScriptException nse) {
-                            return false;
-                        }
+                if (mapScriptCommands && player.canUseCommand("/editscript")) {
+                    WorldEditSession session = getSession(player);
+                    EditSession editSession =
+                            new EditSession(session.getBlockChangeLimit());
+
+                    String filename = split[0].substring(1) + ".js";
+                    String[] args = new String[split.length - 1];
+                    System.arraycopy(split, 1, args, 0, split.length - 1);
+
+                    try {
+                        return runScript(player, session, editSession, filename, args);
+                    } catch (NoSuchScriptException nse) {
+                        return false;
+                    } finally {
+                        session.remember(editSession);
                     }
                 }
             }
@@ -277,26 +294,30 @@ public class WorldEdit extends Plugin {
             return false;
         } catch (NumberFormatException e) {
             player.sendMessage(Colors.Rose + "Number expected; string given.");
-            return true;
         } catch (IncompleteRegionException e2) {
             player.sendMessage(Colors.Rose + "The edit region has not been fully defined.");
-            return true;
         } catch (UnknownItemException e3) {
             player.sendMessage(Colors.Rose + "Unknown item.");
-            return true;
         } catch (DisallowedItemException e4) {
             player.sendMessage(Colors.Rose + "Disallowed item.");
-            return true;
-        } catch (InsufficientArgumentsException e5) {
-            player.sendMessage(Colors.Rose + e5.getMessage());
-            return true;
+        } catch (MaxChangedBlocksException e5) {
+            player.sendMessage(Colors.Rose + "The maximum number of blocks changed ("
+                    + e5.getBlockLimit() + ") in an instance was reached.");
+        } catch (InsufficientArgumentsException e6) {
+            player.sendMessage(Colors.Rose + e6.getMessage());
+        } catch (WorldEditException e7) {
+            player.sendMessage(Colors.Rose + e7.getMessage());
         }
+
+        return true;
     }
 
     /**
      * The main meat of command processing.
      * 
      * @param player
+     * @param session
+     * @param editSession
      * @param split
      * @return
      * @throws UnknownItemException
@@ -304,13 +325,10 @@ public class WorldEdit extends Plugin {
      * @throws InsufficientArgumentsException
      * @throws DisallowedItemException
      */
-    private boolean handleEditCommand(Player player, String[] split)
-            throws UnknownItemException, IncompleteRegionException,
-                   InsufficientArgumentsException, DisallowedItemException
+    private boolean performCommand(Player player, WorldEditSession session,
+            EditSession editSession, String[] split)
+            throws WorldEditException
     {
-        WorldEditSession session = getSession(player);
-        EditSession editSession = new EditSession();
-
         // Set edit position #1
         if (split[0].equalsIgnoreCase("/editpos1")) {
             session.setPos1((int)Math.floor(player.getX()),
@@ -327,6 +345,14 @@ public class WorldEdit extends Plugin {
             player.sendMessage(Colors.LightPurple + "Second edit position set.");
             return true;
 
+        // Set edit position #2
+        } else if (split[0].equalsIgnoreCase("/setchangelimit")) {
+            checkArgs(split, 1);
+            int limit = Math.max(-1, Integer.parseInt(split[1]));
+            session.setBlockChangeLimit(limit);
+            player.sendMessage(Colors.LightPurple + "Block change limit set.");
+            return true;
+
         // Undo
         } else if (split[0].equalsIgnoreCase("/editundo")) {
             if (session.undo()) {
@@ -368,7 +394,6 @@ public class WorldEdit extends Plugin {
                                                         (int)Math.floor(player.getZ()));
                 session.getClipboard().paste(editSession, pos,
                     split[0].equalsIgnoreCase("/editpaste"));
-                session.remember(editSession);
                 logger.log(Level.INFO, player.getName() + " used " + split[0]);
                 player.sendMessage(Colors.LightPurple + "Pasted.");
             }
@@ -393,8 +418,6 @@ public class WorldEdit extends Plugin {
             logger.log(Level.INFO, player.getName() + " used /editfill");
             player.sendMessage(Colors.LightPurple + affected + " block(s) have been created.");
 
-            session.remember(editSession);
-
             return true;
 
         // Remove blocks above current position
@@ -420,8 +443,6 @@ public class WorldEdit extends Plugin {
             logger.log(Level.INFO, player.getName() + " used /removeabove");
             player.sendMessage(Colors.LightPurple + affected + " block(s) have been removed.");
 
-            session.remember(editSession);
-
             return true;
 
         // Load .schematic to clipboard
@@ -534,8 +555,6 @@ public class WorldEdit extends Plugin {
             logger.log(Level.INFO, player.getName() + " used /editset");
             player.sendMessage(Colors.LightPurple + affected + " block(s) have been set.");
 
-            session.remember(editSession);
-
             return true;
 
         // Set the outline of a region
@@ -571,8 +590,6 @@ public class WorldEdit extends Plugin {
             logger.log(Level.INFO, player.getName() + " used /editoutline");
             player.sendMessage(Colors.LightPurple + affected + " block(s) have been set.");
 
-            session.remember(editSession);
-
             return true;
 
         // Replace all blocks in the region
@@ -598,8 +615,6 @@ public class WorldEdit extends Plugin {
             logger.log(Level.INFO, player.getName() + " used /editreplace");
             player.sendMessage(Colors.LightPurple + affected + " block(s) have been replaced.");
 
-            session.remember(editSession);
-
             return true;
 
         // Lay blocks over an area
@@ -628,8 +643,6 @@ public class WorldEdit extends Plugin {
             logger.log(Level.INFO, player.getName() + " used /editoverlay");
             player.sendMessage(Colors.LightPurple + affected + " block(s) have been overlayed.");
 
-            session.remember(editSession);
-
             return true;
 
         // Copy
@@ -668,7 +681,8 @@ public class WorldEdit extends Plugin {
      * @return
      */
     private int fill(EditSession editSession, int x, int z, int cx, int cy,
-                     int cz, int blockType, int radius, int minY) {
+            int cz, int blockType, int radius, int minY)
+            throws MaxChangedBlocksException {
         double dist = Math.sqrt(Math.pow(cx - x, 2) + Math.pow(cz - z, 2));
         int affected = 0;
         
@@ -699,10 +713,12 @@ public class WorldEdit extends Plugin {
      * @param z
      * @param blockType
      * @param minY
+     * @throws MaxChangedBlocksException
      * @return
      */
     private int fillY(EditSession editSession, int x, int cy,
-                      int z, int blockType, int minY) {
+        int z, int blockType, int minY)
+        throws MaxChangedBlocksException {
         int affected = 0;
         
         for (int y = cy; y > minY; y--) {
@@ -787,7 +803,6 @@ public class WorldEdit extends Plugin {
                     player.sendMessage(Colors.Rose + filename + ": execution error: " + err.getMessage());
                 } finally {
                     Context.exit();
-                    session.remember(editSession);
                 }
             }
 

src/WorldEditSession.java

@@ -36,6 +36,7 @@ public class WorldEditSession {
     private boolean toolControl = true;
     private int[] lastToolPos1 = new int[3];
     private long lastToolClick = 0;
+    private int maxBlocksChanged = -1;
 
     /**
      * Clear history.
@@ -337,4 +338,21 @@ public class WorldEditSession {
     public void triggerToolClick() {
         lastToolClick = System.currentTimeMillis();
     }
+
+    /**
+     * Get the maximum number of blocks that can be changed in an edit session.
+     * @return
+     */
+    public int getBlockChangeLimit() {
+        return maxBlocksChanged;
+    }
+
+    /**
+     * Set the maximum number of blocks that can be changed.
+     * 
+     * @param maxBlocksChanged
+     */
+    public void setBlockChangeLimit(int maxBlocksChanged) {
+        this.maxBlocksChanged = maxBlocksChanged;
+    }
 }

src/com/sk89q/worldedit/DisallowedItemException.java

@@ -23,6 +23,6 @@ package com.sk89q.worldedit;
  *
  * @author sk89q
  */
-public class DisallowedItemException extends Exception {
+public class DisallowedItemException extends WorldEditException {
 
 }

src/com/sk89q/worldedit/IncompleteRegionException.java

@@ -24,6 +24,6 @@ package com.sk89q.worldedit;
  *
  * @author Albert
  */
-public class IncompleteRegionException extends Exception {
+public class IncompleteRegionException extends WorldEditException {
 
 }

src/com/sk89q/worldedit/InsufficientArgumentsException.java

@@ -23,7 +23,7 @@ package com.sk89q.worldedit;
  *
  * @author sk89q
  */
-public class InsufficientArgumentsException extends Exception {
+public class InsufficientArgumentsException extends WorldEditException {
     public InsufficientArgumentsException(String error) {
         super(error);
     }

src/com/sk89q/worldedit/MaxChangedBlocksException.java

@@ -0,0 +1,36 @@
+// $Id$
+/*
+ * 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;
+
+/**
+ *
+ * @author sk89q
+ */
+public class MaxChangedBlocksException extends WorldEditException {
+    int maxBlocks;
+
+    public MaxChangedBlocksException(int maxBlocks) {
+        this.maxBlocks = maxBlocks;
+    }
+
+    public int getBlockLimit() {
+        return maxBlocks;
+    }
+}

src/com/sk89q/worldedit/NoSuchScriptException.java

@@ -23,6 +23,6 @@ package com.sk89q.worldedit;
  *
  * @author Albert
  */
-public class NoSuchScriptException extends Exception {
+public class NoSuchScriptException extends WorldEditException {
 
 }

src/com/sk89q/worldedit/SchematicLoadException.java

@@ -23,7 +23,7 @@ package com.sk89q.worldedit;
  *
  * @author Albert
  */
-public class SchematicLoadException extends Exception {
+public class SchematicLoadException extends WorldEditException {
     public SchematicLoadException(String error) {
         super(error);
     }

src/com/sk89q/worldedit/UnknownItemException.java

@@ -24,6 +24,6 @@ package com.sk89q.worldedit;
  *
  * @author sk89q
  */
-public class UnknownItemException extends Exception {
+public class UnknownItemException extends WorldEditException {
 
 }

src/com/sk89q/worldedit/WorldEditException.java

@@ -0,0 +1,33 @@
+// $Id$
+/*
+ * 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;
+
+/**
+ *
+ * @author Albert
+ */
+public abstract class WorldEditException extends Exception {
+    protected WorldEditException() {
+    }
+
+    protected WorldEditException(String msg) {
+        super(msg);
+    }
+}