Added a -s flag to //chunk, which extends your current selection to the encompassed chunks.

src/main/java/com/sk89q/worldedit/commands/SelectionCommands.java

@@ -170,7 +170,8 @@ public class SelectionCommands {
     @Command(
         aliases = {"/chunk"},
         usage = "",
-        desc = "Set the selection to your current chunk",
+        flags = "s",
+        desc = "Set the selection to your current chunk. The -s flag extends your current selection to the encompassed chunks.",
         min = 0,
         max = 0
     )
@@ -179,9 +180,30 @@ public class SelectionCommands {
             LocalSession session, LocalPlayer player, EditSession editSession)
             throws WorldEditException {
 
-        Vector2D min2D = ChunkStore.toChunk(player.getBlockIn());
-        Vector min = new Vector(min2D.getBlockX() * 16, 0, min2D.getBlockZ() * 16);
-        Vector max = min.add(15, 127, 15);
+        final Vector min;
+        final Vector max;
+        if (args.hasFlag('s')) {
+            Region region = session.getSelection(player.getWorld());
+
+            final Vector2D min2D = ChunkStore.toChunk(region.getMinimumPoint());
+            final Vector2D max2D = ChunkStore.toChunk(region.getMaximumPoint());
+
+            min = new Vector(min2D.getBlockX() * 16, 0, min2D.getBlockZ() * 16);
+            max = new Vector(max2D.getBlockX() * 16 + 15, 127, max2D.getBlockZ() * 16 + 15);
+
+            player.print("Chunks selected: ("
+                    + min2D.getBlockX() + ", " + min2D.getBlockZ() + ") - ("
+                    + max2D.getBlockX() + ", " + max2D.getBlockZ() + ")");
+        }
+        else {
+            final Vector2D min2D = ChunkStore.toChunk(player.getBlockIn());
+
+            min = new Vector(min2D.getBlockX() * 16, 0, min2D.getBlockZ() * 16);
+            max = min.add(15, 127, 15);
+
+            player.print("Chunk selected: "
+                    + min2D.getBlockX() + ", " + min2D.getBlockZ());
+        }
 
         CuboidRegionSelector selector = new CuboidRegionSelector();
         selector.selectPrimary(min);
@@ -190,8 +212,6 @@ public class SelectionCommands {
         
         session.dispatchCUISelection(player);
 
-        player.print("Chunk selected: "
-                + min2D.getBlockX() + ", " + min2D.getBlockZ());
     }
     
     @Command(