tiles.rc syntax: allow inheriting of another tile's images/attributes

To inherit, just put the name of tile you want to inherit from in parenthesis
at the beginning of the specification.
E.g.

road-1-1     (road) roads/1-1 (road-north)(road-south)

will define a tile named "road-1-1", which first starts with all the images
and properties of tile "road" and then layers on top of that the 'road/1-1'
image, and then sets the 'road-north' and 'road-south' flags.

git-svn-id: https://micropolis.googlecode.com/svn/trunk/micropolis-java@754 d9718cc8-9f43-0410-858b-315f434eb58c

src/micropolisj/build_tool/MakeTiles.java

@@ -47,7 +47,7 @@ public class MakeTiles
 			String rawSpec = recipe.getProperty(Integer.toString(i));
 			assert rawSpec != null;
 
-			TileSpec tileSpec = TileSpec.parse(i, rawSpec);
+			TileSpec tileSpec = TileSpec.parse(i, rawSpec, recipe);
 			FrameSpec ref = parseFrameSpec(tileSpec);
 			drawTo(ref, gr, 0, TILE_SIZE*i);
 		}

src/micropolisj/engine/TileSpec.java

@@ -20,10 +20,10 @@ public class TileSpec
 		this.images = new ArrayList<String>();
 	}
 
-	public static TileSpec parse(int tileNumber, String inStr)
+	public static TileSpec parse(int tileNumber, String inStr, Properties tilesRc)
 	{
 		TileSpec ts = new TileSpec(tileNumber);
-		ts.load(inStr);
+		ts.load(inStr, tilesRc);
 		return ts;
 	}
 
@@ -43,7 +43,7 @@ public class TileSpec
 		return images.toArray(new String[0]);
 	}
 
-	protected void load(String inStr)
+	protected void load(String inStr, Properties tilesRc)
 	{
 		Scanner in = new Scanner(inStr);
 
@@ -58,7 +58,17 @@ public class TileSpec
 					v = in.readAttributeValue();
 				}
 				in.eatChar(')');
-				attributes.put(k, v);
+
+				if (!attributes.containsKey(k)) {
+					attributes.put(k, v);
+					String sup = tilesRc.getProperty(k);
+					if (sup != null) {
+						load(sup, tilesRc);
+					}
+				}
+				else {
+					attributes.put(k, v);
+				}
 			}
 
 			else if (in.peekChar() == '|' || in.peekChar() == ',') {

src/micropolisj/engine/Tiles.java

@@ -37,7 +37,7 @@ public class Tiles
 				continue;
 			}
 
-			tiles[i] = TileSpec.parse(i, rawSpec);
+			tiles[i] = TileSpec.parse(i, rawSpec, tilesRc);
 		}
 
 		for (int i = 0; i < tiles.length; i++) {