Added support for Extent interface.

src/main/java/com/sk89q/worldedit/EditSession.java

@@ -27,17 +27,18 @@ import com.sk89q.worldedit.blocks.BlockType;
 import com.sk89q.worldedit.expression.Expression;
 import com.sk89q.worldedit.expression.ExpressionException;
 import com.sk89q.worldedit.expression.runtime.RValue;
-import com.sk89q.worldedit.function.FlatRegionMaskingFilter;
 import com.sk89q.worldedit.function.GroundFunction;
 import com.sk89q.worldedit.function.RegionMaskingFilter;
 import com.sk89q.worldedit.function.block.BlockCount;
 import com.sk89q.worldedit.function.block.BlockReplace;
 import com.sk89q.worldedit.function.block.Naturalizer;
-import com.sk89q.worldedit.function.generator.ForestGenerator;
 import com.sk89q.worldedit.function.generator.GardenPatchGenerator;
 import com.sk89q.worldedit.function.operation.OperationHelper;
 import com.sk89q.worldedit.function.util.RegionOffset;
-import com.sk89q.worldedit.function.visitor.*;
+import com.sk89q.worldedit.function.visitor.DownwardVisitor;
+import com.sk89q.worldedit.function.visitor.LayerVisitor;
+import com.sk89q.worldedit.function.visitor.RecursiveVisitor;
+import com.sk89q.worldedit.function.visitor.RegionVisitor;
 import com.sk89q.worldedit.interpolation.Interpolation;
 import com.sk89q.worldedit.interpolation.KochanekBartelsInterpolation;
 import com.sk89q.worldedit.interpolation.Node;
@@ -56,9 +57,7 @@ import java.util.*;
 
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
-import static com.sk89q.worldedit.regions.Regions.asFlatRegion;
+import static com.sk89q.worldedit.regions.Regions.*;
-import static com.sk89q.worldedit.regions.Regions.maximumBlockY;
-import static com.sk89q.worldedit.regions.Regions.minimumBlockY;
 
 /**
  * This class can wrap all block editing operations into one "edit session" that
@@ -70,7 +69,7 @@ import static com.sk89q.worldedit.regions.Regions.minimumBlockY;
  *
  * @author sk89q
  */
-public class EditSession {
+public class EditSession implements Extent {
 
     /**
      * Random number generator.
@@ -248,6 +247,11 @@ public class EditSession {
         return result;
     }
 
+    @Override
+    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) {
+        return setBlock(location, block, true);
+    }
+
     /**
      * Sets the block at position x, y, z with a block type. If queue mode is
      * enabled, blocks may not be actually set in world until flushQueue() is

src/main/java/com/sk89q/worldedit/Extent.java

@@ -0,0 +1,77 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * 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;
+
+import com.sk89q.worldedit.blocks.BaseBlock;
+
+/**
+ * A world, portion of a world, clipboard, or other object that can have blocks set or
+ * entities placed.
+ */
+public interface Extent {
+
+    /**
+     * Get a copy of the block at the given location. May return null if the location
+     * given is out of bounds. The returned block must not be tied to any real block
+     * in the world, so changes to the returned {@link BaseBlock} have no effect until
+     * {@link #setBlock(Vector, BaseBlock)} is called.
+     *
+     * @param location location of the block
+     * @return the block, or null if the block does not exist
+     */
+    BaseBlock getBlock(Vector location);
+
+    /**
+     * Get the block ID at the given location.
+     *
+     * @param location location of the block
+     * @return the block ID
+     */
+    int getBlockType(Vector location);
+
+    /**
+     * Get the data value of the block at the given location.
+     *
+     * @param location the location of the block
+     * @return the block data value
+     */
+    int getBlockData(Vector location);
+
+    /**
+     * Change the block at the given location to the given block. The operation may
+     * not tie the given {@link BaseBlock} to the world, so future changes to the
+     * {@link BaseBlock} do not affect the world until this method is called again.
+     *
+     * <p>The return value of this method indicates whether the change "went through," as
+     * in the block was changed in the world in any way. If the new block is no different
+     * than the block already at the position in the world, 'false' would be returned.
+     * If the position is invalid (out of bounds, for example), then nothing should
+     * occur and 'false' should be returned. If possible, the return value should be
+     * accurate as possible, but implementations may choose to not provide an accurate
+     * value if it is not possible to know.</p>
+     *
+     * @param location location of the block
+     * @param block block to set
+     * @param notifyAdjacent true to notify adjacent blocks of changes
+     * @return true if the block was successfully set (return value may not be accurate)
+     */
+    boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent);
+
+}

src/main/java/com/sk89q/worldedit/LocalWorld.java

@@ -19,31 +19,21 @@
 
 package com.sk89q.worldedit;
 
-import java.util.PriorityQueue;
+import com.sk89q.worldedit.blocks.*;
-import java.util.Random;
-
-import com.sk89q.worldedit.blocks.BaseBlock;
-import com.sk89q.worldedit.blocks.BaseItemStack;
-import com.sk89q.worldedit.blocks.BlockID;
-import com.sk89q.worldedit.blocks.BlockType;
-import com.sk89q.worldedit.blocks.ChestBlock;
-import com.sk89q.worldedit.blocks.DispenserBlock;
-import com.sk89q.worldedit.blocks.FurnaceBlock;
-import com.sk89q.worldedit.blocks.MobSpawnerBlock;
-import com.sk89q.worldedit.blocks.NoteBlock;
-import com.sk89q.worldedit.blocks.SignBlock;
-import com.sk89q.worldedit.blocks.SkullBlock;
 import com.sk89q.worldedit.foundation.Block;
 import com.sk89q.worldedit.foundation.World;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.TreeGenerator;
 
+import java.util.PriorityQueue;
+import java.util.Random;
+
 /**
  * Represents a world.
  *
  * @author sk89q
  */
-public abstract class LocalWorld implements World {
+public abstract class LocalWorld implements World, Extent {
     /**
      * Named flags to use as parameters to {@link LocalWorld#killMobs(Vector, double, int)}
      */
@@ -528,6 +518,11 @@ public abstract class LocalWorld implements World {
     public int killEntities(LocalEntity... entities) {
         return 0;
     }
+
+    @Override
+    public boolean setBlock(Vector pt, BaseBlock block, boolean notifyAdjacent) {
+        return setBlock(pt, (Block) block, notifyAdjacent);
+    }
     
     @Override
     public boolean setBlock(Vector pt, Block block, boolean notifyAdjacent) {