2 files changed, 34 insertions, 18 deletions

diff --git a/core/src/ch/asynk/tankontank/engine/Board.java b/core/src/ch/asynk/tankontank/engine/Board.java
index 7b6a414..2e78ca0 100644
--- a/core/src/ch/asynk/tankontank/engine/Board.java
+++ b/core/src/ch/asynk/tankontank/engine/Board.java
@@ -5,6 +5,7 @@ import java.util.List;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.LinkedHashSet;
+import java.util.Collection;
 
 import com.badlogic.gdx.Gdx;
 
@@ -36,6 +37,16 @@ public abstract class Board implements Disposable
         public Tile getNewTile(float x, float y, int col, int row);
     }
 
+    public interface TileCollection extends Collection<Tile>
+    {
+        public Tile first();
+        public void show();
+        public void hide();
+        public void enable(int i, boolean enable);
+        public void getPawns(Collection<Pawn> pawns);
+        public int fromNodes(Collection<SearchBoard.Node> nodes);
+    }
+
     public static class Config
     {
         public int cols;
@@ -239,21 +250,21 @@ public abstract class Board implements Disposable
             debugShapes.setTransformMatrix(prevTransform);
     }
 
-    protected int buildPossibleMoves(Pawn pawn, TileList moves)
+    protected int buildPossibleMoves(Pawn pawn, TileCollection moves)
     {
         Tile from = pawn.getTile();
         Set<SearchBoard.Node> nodes = searchBoard.possibleMovesFrom(pawn, from.getCol(), from.getRow());
         return moves.fromNodes(nodes);
     }
 
-    protected int buildPossibleTargets(Pawn pawn, TileList targets)
+    protected int buildPossibleTargets(Pawn pawn, TileCollection targets)
     {
         Tile from = pawn.getTile();
         List<SearchBoard.Node> nodes = searchBoard.possibleTargetsFrom(pawn, from.getCol(), from.getRow());
         return targets.fromNodes(nodes);
     }
 
-    protected int buildPossibleTargets(Pawn pawn, Iterator<Pawn> units, TileList targets)
+    protected int buildPossibleTargets(Pawn pawn, Iterator<Pawn> units, TileCollection targets)
     {
         Tile from = pawn.getTile();
         targets.clear();
@@ -267,7 +278,7 @@ public abstract class Board implements Disposable
         return targets.size();
     }
 
-    protected int buildMoveAssists(Pawn pawn, TileList assists)
+    protected int buildMoveAssists(Pawn pawn, TileCollection assists)
     {
         assists.clear();
         setAdjacentTiles(pawn.getTile(), neighbours);
@@ -283,7 +294,7 @@ public abstract class Board implements Disposable
         return assists.size();
     }
 
-    protected int buildAttackAssists(Pawn pawn, Pawn target, Iterator<Pawn> units, TileList assists)
+    protected int buildAttackAssists(Pawn pawn, Pawn target, Iterator<Pawn> units, TileCollection assists)
     {
         assists.clear();
         Tile to = target.getTile();
@@ -300,7 +311,7 @@ public abstract class Board implements Disposable
         return assists.size();
     }
 
-    private int nodesToSet(List<ArrayList<SearchBoard.Node>> nodes, TileList tiles)
+    private int nodesToSet(List<ArrayList<SearchBoard.Node>> nodes, TileCollection tiles)
     {
         tiles.clear();
 
@@ -316,14 +327,14 @@ public abstract class Board implements Disposable
         return nodes.size();
     }
 
-    protected int buildPossiblePaths(Pawn pawn, Tile to, TileList tiles)
+    protected int buildPossiblePaths(Pawn pawn, Tile to, TileCollection tiles)
     {
         Tile from = pawn.getTile();
         paths = searchBoard.possiblePaths(pawn, from.getCol(), from.getRow(), to.getCol(), to.getRow());
         return nodesToSet(paths, tiles);
     }
 
-    protected int possiblePathsFilterToggle(Tile tile, TileList tiles)
+    protected int possiblePathsFilterToggle(Tile tile, TileCollection tiles)
     {
         paths = searchBoard.possiblePathsFilterToggle(tile.getCol(), tile.getRow());
         return nodesToSet(paths, tiles);
diff --git a/core/src/ch/asynk/tankontank/engine/TileList.java b/core/src/ch/asynk/tankontank/engine/TileList.java
index b26a5e8..0e56aac 100644
--- a/core/src/ch/asynk/tankontank/engine/TileList.java
+++ b/core/src/ch/asynk/tankontank/engine/TileList.java
@@ -4,7 +4,7 @@ import java.util.List;
 import java.util.ArrayList;
 import java.util.Collection;
 
-public class TileList extends ArrayList<Tile>
+public class TileList extends ArrayList<Tile> implements Board.TileCollection
 {
     private final Board board;
     private int overlay;
@@ -16,15 +16,9 @@ public class TileList extends ArrayList<Tile>
         this.overlay = overlay;
     }
 
-    public int fromNodes(Collection<SearchBoard.Node> nodes)
+    public Tile first()
     {
-        clear();
-        for (SearchBoard.Node node : nodes) {
-            Tile tile = board.getTile(node.col, node.row);
-            add(tile);
-        }
-
-        return size();
+        return get(0);
     }
 
     public void show()
@@ -43,10 +37,21 @@ public class TileList extends ArrayList<Tile>
             board.enableOverlayOn(tile, i, enable);
     }
 
-    public void getPawns(List<Pawn> pawns)
+    public void getPawns(Collection<Pawn> pawns)
     {
         pawns.clear();
         for (Tile tile : this)
             pawns.add(tile.getTopPawn());
     }
+
+    public int fromNodes(Collection<SearchBoard.Node> nodes)
+    {
+        clear();
+        for (SearchBoard.Node node : nodes) {
+            Tile tile = board.getTile(node.col, node.row);
+            add(tile);
+        }
+
+        return size();
+    }
 }