Add new piece sets.

Add new piece sets from PyChess and from Wikimedia Commons.

DroidFishApp/src/main/java/org/petero/droidfish/DroidFish.java

@@ -169,7 +169,6 @@ public class DroidFish extends Activity
                                   ActivityCompat.OnRequestPermissionsResultCallback {
     // FIXME!!! PGN view option: game continuation (for training)
     // FIXME!!! Implement bookmark mechanism for positions in pgn files
-    // FIXME!!! Add support for "Chess Leipzig" font
 
     // FIXME!!! Add support for "no time control" and "hour-glass time control" as defined by the PGN standard
 

DroidFishApp/src/main/java/org/petero/droidfish/PieceSet.java

@@ -20,7 +20,10 @@ import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Arrays;
 import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
@@ -31,6 +34,9 @@ public class PieceSet {
     private HashMap<String,Integer> nameToPieceType;
     private SVG[] svgTable = new SVG[Piece.nPieceTypes];
     private Bitmap[] bitmapTable = new Bitmap[Piece.nPieceTypes];
+    private Set<String> availPieceSets;
+    private String defaultPieceSet = "chesscases";
+    private String cachedPieceSet = defaultPieceSet;
     private int cachedSquareSize = -1;
     private int cachedWhiteColor = 0xffffffff;
     private int cachedBlackColor = 0xff000000;
@@ -57,14 +63,26 @@ public class PieceSet {
         nameToPieceType.put("bn.svg", Piece.BKNIGHT);
         nameToPieceType.put("bp.svg", Piece.BPAWN);
 
+        String[] sa = {
+                defaultPieceSet,
+                "alfonso", "alpha", "cburnett", "chessicons", "chessmonk",
+                "freestaunton", "kilfiger", "leipzig", "magnetic", "maya",
+                "merida", "merida_new", "metaltops", "pirat", "regular",
+                "wikimedia",
+        };
+        availPieceSets = new HashSet<>(Arrays.asList(sa));
+
         parseSvgData();
     }
 
     /** Re-parse SVG data if piece properties have changed. */
     final void readPrefs(SharedPreferences settings) {
-        boolean modified = false; // FIXME!! check for new piece set
-        if (modified)
+        String pieceSet = settings.getString("viewPieceSet", cachedPieceSet);
+        boolean modified = !pieceSet.equals(cachedPieceSet);
+        if (modified) {
+            cachedPieceSet = pieceSet;
             parseSvgData();
+        }
 
         ColorTheme ct = ColorTheme.instance();
         int whiteColor = ct.getColor(ColorTheme.BRIGHT_PIECE);
@@ -118,7 +136,10 @@ public class PieceSet {
     }
 
     private ZipInputStream getZipStream() throws IOException {
-        InputStream is = DroidFishApp.getContext().getAssets().open("pieces/chesscases.zip");
+        String set = availPieceSets.contains(cachedPieceSet) ? cachedPieceSet
+                                                             : defaultPieceSet;
+        String name = "pieces/" + set + ".zip";
+        InputStream is = DroidFishApp.getContext().getAssets().open(name);
         return new ZipInputStream(is);
     }
 

DroidFishApp/src/main/res/raw/about.html

@@ -229,7 +229,10 @@
     </ul>
   </li>
   <li>
-    SVG reader from <a href="http://code.google.com/p/svg-android/">svg-android</a> project.
+    SVG library from <a href="http://bigbadaboom.github.io/androidsvg/">androidsvg</a> project.
+  </li>
+  <li>
+    Chess pieces from <a href="http://www.pychess.org">PyChess</a> project.
   </li>
   <li>
     Color picker, Copyright © 2010 Daniel Nilsson and Copyright © 2011 Sergey Margaritov.

DroidFishApp/src/main/res/values/strings.xml

@@ -12,6 +12,7 @@
     <string name="scroll_sensitivity_default">2</string>
     <string name="book_line_length_default">1000000</string>
     <string name="viewPieceType_default">1</string>
+    <string name="viewPieceSet_default">chesscases</string>
     <string name="autoDelay_default">5000</string>
     <string name="move_announce_type_default">off</string>
     <string name="cpu_warning">\
@@ -399,6 +400,8 @@ you are not actively using the program.\
     <string name="prefs_showVariationLine_summary">Show current variations in status area</string>
     <string name="prefs_viewPieceType_title">Piece Names</string>
     <string name="prefs_viewPieceType_summary">Control how chess piece names are displayed</string>
+    <string name="prefs_viewPieceSet_title">Piece Set</string>
+    <string name="prefs_viewPieceSet_summary">Select chess piece set</string>
     <string name="prefs_blindMode_title">Blindfold mode</string>
     <string name="prefs_blindMode_summary">Show blank board instead of pieces</string>
     <string name="prefs_pgn_import">PGN import</string>
@@ -466,6 +469,44 @@ you are not actively using the program.\
         <item>1</item>
         <item>2</item>
     </string-array>
+    <string-array name="viewPieceSet_texts">
+        <item>Chess Cases</item>
+        <item>Alfonso</item>
+        <item>Alpha</item>
+        <item>Cburnett</item>
+        <item>Chess Icons</item>
+        <item>Chess Monk</item>
+        <item>Free Staunton</item>
+        <item>Kilfiger</item>
+        <item>Leipzig</item>
+        <item>Magnetic</item>
+        <item>Maya</item>
+        <item>Merida</item>
+        <item>Merida New</item>
+        <item>Metal Tops</item>
+        <item>Pirat</item>
+        <item>Regular</item>
+        <item>Wikimedia</item>
+    </string-array>
+    <string-array name="viewPieceSet_values">
+        <item>chesscases</item>
+        <item>alfonso</item>
+        <item>alpha</item>
+        <item>cburnett</item>
+        <item>chessicons</item>
+        <item>chessmonk</item>
+        <item>freestaunton</item>
+        <item>kilfiger</item>
+        <item>leipzig</item>
+        <item>magnetic</item>
+        <item>maya</item>
+        <item>merida</item>
+        <item>merida_new</item>
+        <item>metaltops</item>
+        <item>pirat</item>
+        <item>regular</item>
+        <item>wikimedia</item>
+    </string-array>
     <string-array name="engine_hash_texts">
         <item>16 MB</item>
         <item>32 MB</item>

DroidFishApp/src/main/res/xml/preferences.xml

@@ -153,7 +153,15 @@
             android:entries="@array/viewPieceType_texts" 
             android:defaultValue="@string/viewPieceType_default">
         </ListPreference>
-        <CheckBoxPreference 
+        <ListPreference
+            android:key="viewPieceSet"
+            android:title="@string/prefs_viewPieceSet_title"
+            android:summary="@string/prefs_viewPieceSet_summary"
+            android:entryValues="@array/viewPieceSet_values"
+            android:entries="@array/viewPieceSet_texts"
+            android:defaultValue="@string/viewPieceSet_default">
+        </ListPreference>
+        <CheckBoxPreference
             android:key="blindMode" 
             android:title="@string/prefs_blindMode_title" 
             android:summary="@string/prefs_blindMode_summary"