Added //flip to flip clipboards.

src/CuboidClipboard.java

@@ -33,6 +33,15 @@ import java.util.List;
  * @author sk89q
  */
 public class CuboidClipboard {
+    /**
+     * Flip direction.
+     */
+    public enum FlipDirection {
+        NORTH_SOUTH,
+        WEST_EAST,
+        UP_DOWN
+    }
+
     private BaseBlock[][][] data;
     private Vector offset;
     private Vector origin;
@@ -105,7 +114,7 @@ public class CuboidClipboard {
 
     /**
      * Rotate the clipboard in 2D. It can only rotate by angles divisible by 90.
-     * 
+     *
      * @param angle in degrees
      */
     public void rotate2D(int angle) {
@@ -145,6 +154,52 @@ public class CuboidClipboard {
                 .subtract(shiftX, 0, shiftZ);;
     }
 
+    /**
+     * Flip the clipboard.
+     *
+     * @param dir
+     */
+    public void flip(FlipDirection dir) {
+        int width = getWidth();
+        int length = getLength();
+        int height = getHeight();
+
+        if (dir == FlipDirection.NORTH_SOUTH) {
+            int len = (int)Math.floor(width / 2);
+            for (int xs = 0; xs < len; xs++) {
+                for (int z = 0; z < length; z++) {
+                    for (int y = 0; y < height; y++) {
+                        BaseBlock old = data[xs][y][z];
+                        data[xs][y][z] = data[width - xs - 1][y][z];
+                        data[width - xs - 1][y][z] = old;
+                    }
+                }
+            }
+        } else if (dir == FlipDirection.WEST_EAST) {
+            int len = (int)Math.floor(length / 2);
+            for (int zs = 0; zs < len; zs++) {
+                for (int x = 0; x < width; x++) {
+                    for (int y = 0; y < height; y++) {
+                        BaseBlock old = data[x][y][zs];
+                        data[x][y][zs] = data[x][y][length - zs - 1];
+                        data[x][y][length - zs - 1] = old;
+                    }
+                }
+            }
+        } else if (dir == FlipDirection.UP_DOWN) {
+            int len = (int)Math.floor(height / 2);
+            for (int ys = 0; ys < len; ys++) {
+                for (int x = 0; x < width; x++) {
+                    for (int z = 0; z < length; z++) {
+                        BaseBlock old = data[x][ys][z];
+                        data[x][ys][z] = data[x][height - ys - 1][z];
+                        data[x][height - ys - 1][z] = old;
+                    }
+                }
+            }
+        }
+    }
+
     /**
      * Copy to the clipboard.
      *

src/WorldEditListener.java

@@ -143,6 +143,7 @@ public class WorldEditListener extends PluginListener {
         commands.put("//expand", "[Num] <Dir> - Expands the selection");
         commands.put("//contract", "[Num] <Dir> - Contracts the selection");
         commands.put("//rotate", "[Angle] - Rotate the clipboard");
+        commands.put("//flip", "<Dir> - Flip the clipboard");
         commands.put("//hcyl", "[ID] [Radius] <Height> - Create a vertical hollow cylinder");
         commands.put("//cyl", "[ID] [Radius] <Height> - Create a vertical cylinder");
         commands.put("//sphere", "[ID] [Radius] <Raised?> - Create a sphere");
@@ -1260,6 +1261,18 @@ public class WorldEditListener extends PluginListener {
 
             return true;
 
+        // Flip
+        } else if (split[0].equalsIgnoreCase("//flip")) {
+            checkArgs(split, 0, 1, split[0]);
+            CuboidClipboard.FlipDirection dir = getFlipDirection(player,
+                    split.length > 1 ? split[1].toLowerCase() : "me");
+
+            CuboidClipboard clipboard = session.getClipboard();
+            clipboard.flip(dir);
+            player.print("Clipboard flipped.");
+
+            return true;
+
         // Kill mobs
         } else if (split[0].equalsIgnoreCase("/butcher")) {
             checkArgs(split, 0, 1, split[0]);
@@ -1573,6 +1586,42 @@ public class WorldEditListener extends PluginListener {
         return new Vector(xm, ym, zm);
     }
 
+    /**
+     * Get the flip direction for a player's direction. May return
+     * null if a direction could not be found.
+     *
+     * @param player
+     * @param dir
+     * @return
+     */
+    public CuboidClipboard.FlipDirection getFlipDirection(
+            WorldEditPlayer player, String dir)
+            throws UnknownDirectionException {
+        int xm = 0;
+        int ym = 0;
+        int zm = 0;
+
+        if (dir.equals("me")) {
+            dir = player.getCardinalDirection();
+        }
+
+        if (dir.charAt(0) == 'w') {
+            return CuboidClipboard.FlipDirection.WEST_EAST;
+        } else if (dir.charAt(0) == 'e') {
+            return CuboidClipboard.FlipDirection.WEST_EAST;
+        } else if (dir.charAt(0) == 's') {
+            return CuboidClipboard.FlipDirection.NORTH_SOUTH;
+        } else if (dir.charAt(0) == 'n') {
+            return CuboidClipboard.FlipDirection.NORTH_SOUTH;
+        } else if (dir.charAt(0) == 'u') {
+            return CuboidClipboard.FlipDirection.UP_DOWN;
+        } else if (dir.charAt(0) == 'd') {
+            return CuboidClipboard.FlipDirection.UP_DOWN;
+        } else {
+            throw new UnknownDirectionException(dir);
+        }
+    }
+
     /**
      * Remove a session.
      *