flutter: Support standard notation

src/ui/flutter_app/lib/common/config.dart

@@ -40,6 +40,7 @@ class Config {
   static bool developerMode = false;
 
   // Display
+  static bool standardNotationEnabled = true;
   static bool isPieceCountInHandShown = false;
   static double boardBorderLineWidth = 2.0;
   static double boardInnerLineWidth = 2.0;
@@ -86,6 +87,8 @@ class Config {
     Config.developerMode = settings['DeveloperMode'] ?? false;
 
     // Display
+    Config.standardNotationEnabled =
+        settings['StandardNotationEnabled'] ?? true;
     Config.isPieceCountInHandShown =
         settings['IsPieceCountInHandShown'] ?? false;
     Config.boardBorderLineWidth = settings['BoardBorderLineWidth'] ?? 2;
@@ -151,6 +154,7 @@ class Config {
     settings['DeveloperMode'] = Config.developerMode;
 
     // Display
+    settings['StandardNotationEnabled'] = Config.standardNotationEnabled;
     settings['IsPieceCountInHandShown'] = Config.isPieceCountInHandShown;
     settings['BoardBorderLineWidth'] = Config.boardBorderLineWidth;
     settings['BoardInnerLineWidth'] = Config.boardInnerLineWidth;

src/ui/flutter_app/lib/l10n/intl_en.arb

@@ -596,6 +596,10 @@
   "@boardInnerLineWidth": {
     "description": "Board inner line width"
   },
+  "standardNotation": "Standard notation",
+  "@standardNotation": {
+    "description": "Standard notation"
+  },
   "restore": "Restore",
   "@restore": {
     "description": "Restore"

src/ui/flutter_app/lib/l10n/intl_zh.arb

@@ -149,6 +149,7 @@
   "display": "显示",
   "boardBorderLineWidth": "棋盘外框线宽",
   "boardInnerLineWidth": "棋盘内部线宽",
+  "standardNotation": "标准棋谱格式",
   "restore": "重置",
   "restoreDefaultSettings": "恢复默认设置",
   "exitApp": "App 将退出。",

src/ui/flutter_app/lib/mill/recorder.dart

@@ -16,6 +16,8 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+import 'package:sanmill/common/config.dart';
+
 import 'position.dart';
 import 'types.dart';
 
@@ -91,12 +93,38 @@ class GameRecorder {
   }
 
   String buildMoveHistoryText({cols = 2}) {
-    //
     var moveHistoryText = '';
+    int k = 1;
+    String num = "";
 
     for (var i = 0; i < _history.length; i++) {
-      moveHistoryText += '${i < 9 ? ' ' : ''}${i + 1}. ${_history[i].move}　';
-      if ((i + 1) % cols == 0) moveHistoryText += '\n';
+      if (Config.standardNotationEnabled) {
+        if (k % cols == 1) {
+          num = "${(k + 1) ~/ 2}.    ";
+          if (k < 9 * cols) {
+            num = " " + num + " ";
+          }
+        } else {
+          num = "";
+        }
+        if (i + 1 < _history.length &&
+            _history[i + 1].type == MoveType.remove) {
+          moveHistoryText +=
+              '$num${_history[i].notation}${_history[i + 1].notation}    ';
+          i++;
+        } else {
+          moveHistoryText += '$num${_history[i].notation}    ';
+        }
+        k++;
+      } else {
+        moveHistoryText += '${i < 9 ? ' ' : ''}${i + 1}. ${_history[i].move}　';
+      }
+
+      if (Config.standardNotationEnabled) {
+        if ((k + 1) % cols == 0) moveHistoryText += '\n';
+      } else {
+        if ((i + 1) % cols == 0) moveHistoryText += '\n';
+      }
     }
 
     if (moveHistoryText.isEmpty) {

src/ui/flutter_app/lib/mill/types.dart

@@ -40,6 +40,9 @@ class Move {
   // 'move' is the UCI engine's move-string
   String? move = "";
 
+  // "notation" is Standard Notation
+  String? notation = "";
+
   MoveType type = MoveType.none;
 
   // Used to restore fen step counter when undoing move
@@ -55,6 +58,8 @@ class Move {
       from = fromFile = fromRank = fromIndex = invalidMove;
       toFile = int.parse(move![2]);
       toRank = int.parse(move![4]);
+      to = makeSquare(toFile, toRank);
+      notation = "x${squareToNotation[to]}";
       //captured = Piece.noPiece;
     } else if (move!.length == "(1,2)->(3,4)".length) {
       type = MoveType.move;
@@ -64,12 +69,16 @@ class Move {
       fromIndex = squareToIndex[from] ?? invalidMove;
       toFile = int.parse(move![8]);
       toRank = int.parse(move![10]);
+      to = makeSquare(toFile, toRank);
+      notation = "${squareToNotation[from]}-${squareToNotation[to]}";
       removed = Piece.noPiece;
     } else if (move!.length == "(1,2)".length) {
       type = MoveType.place;
       from = fromFile = fromRank = fromIndex = invalidMove;
       toFile = int.parse(move![1]);
       toRank = int.parse(move![3]);
+      to = makeSquare(toFile, toRank);
+      notation = "${squareToNotation[to]}";
       removed = Piece.noPiece;
     } else if (move == "draw") {
       // TODO
@@ -78,7 +87,6 @@ class Move {
       assert(false);
     }
 
-    to = makeSquare(toFile, toRank);
     toIndex = squareToIndex[to] ?? invalidMove;
   }
 
@@ -315,6 +323,48 @@ Map<int, int> squareToIndex = {
   31: 0
 };
 
+/*
+          a b c d e f g
+        7 X --- X --- X 7
+          |\    |    /|
+        6 | X - X - X | 6
+          | |\  |  /| |
+        5 | | X-X-X | | 5
+        4 X-X-X   X-X-X 4
+        3 | | X-X-X | | 3
+          | |/  |  \| |
+        2 | X - X - X | 2
+          |/    |    \|
+        1 X --- X --- X 1
+          a b c d e f g
+ */
+Map<int, String> squareToNotation = {
+  8: "d5",
+  9: "e5",
+  10: "e4",
+  11: "e3",
+  12: "d3",
+  13: "c3",
+  14: "c4",
+  15: "c5",
+  16: "d6",
+  17: "f6",
+  18: "f4",
+  19: "f2",
+  20: "d2",
+  21: "b2",
+  22: "b4",
+  23: "b6",
+  24: "d7",
+  25: "g7",
+  26: "g4",
+  27: "g1",
+  28: "d1",
+  29: "a1",
+  30: "a4",
+  31: "a7"
+};
+
 Map<int, int> indexToSquare = squareToIndex.map((k, v) => MapEntry(v, k));
 
 enum GameResult { pending, win, lose, draw, none }

src/ui/flutter_app/lib/widgets/game_settings_page.dart

@@ -498,4 +498,14 @@ class _GameSettingsPageState extends State<GameSettingsPage> {
 
     Config.save();
   }
+
+  setStandardNotationEnabled(bool value) async {
+    setState(() {
+      Config.standardNotationEnabled = value;
+    });
+
+    print("[config] standardNotationEnabled: $value");
+
+    Config.save();
+  }
 }

src/ui/flutter_app/lib/widgets/personalization_settings_page.dart

@@ -249,6 +249,13 @@ class _PersonalizationSettingsPageState
             titleString: S.of(context).boardTop,
             onTap: setBoardTop,
           ),
+          ListItemDivider(),
+          SettingsSwitchListTile(
+            context: context,
+            value: Config.standardNotationEnabled,
+            onChanged: setStandardNotationEnabled,
+            titleString: S.of(context).standardNotation,
+          ),
         ],
       ),
       SizedBox(height: AppTheme.sizedBoxHeight),
@@ -304,4 +311,14 @@ class _PersonalizationSettingsPageState
 
     Config.save();
   }
+
+  setStandardNotationEnabled(bool value) async {
+    setState(() {
+      Config.standardNotationEnabled = value;
+    });
+
+    print("[config] standardNotationEnabled: $value");
+
+    Config.save();
+  }
 }