flutter: side: 重命名相关变量

src/ui/flutter/lib/game/battle.dart

@@ -47,7 +47,7 @@ class Battle {
   bool regret({steps = 2}) {
     //
     // 轮到自己走棋的时候，才能悔棋
-    if (_position.side != Side.White) {
+    if (_position.side != Side.white) {
       //Audios.playTone('invalid.mp3');
       return false;
     }
@@ -90,7 +90,7 @@ class Battle {
 
   BattleResult scanBattleResult() {
     //
-    final forPerson = (_position.side == Side.White);
+    final forPerson = (_position.side == Side.white);
 
     if (scanLongCatch()) {
       // born 'repeat' position by oppo

src/ui/flutter/lib/mill/mill-base.dart

@@ -3,26 +3,25 @@ enum BattleResult { Pending, Win, Lose, Draw }
 
 class Side {
   //
-  static const Unknown = '-';
-  static const Black = 'b';
-  static const White = 'w';
-
-  static const Ban = 'x';
+  static const unknown = '-';
+  static const black = 'b';
+  static const white = 'w';
+  static const ban = 'x';
 
   static String of(String piece) {
-    if (Black.contains(piece)) return Black;
-    if (White.contains(piece)) return White;
-    if (Ban.contains(piece)) return Ban;
-    return Unknown;
+    if (black.contains(piece)) return black;
+    if (white.contains(piece)) return white;
+    if (ban.contains(piece)) return ban;
+    return unknown;
   }
 
   static bool sameSide(String p1, String p2) {
     return of(p1) == of(p2);
   }
 
-  static String oppo(String side) {
-    if (side == White) return Black;
-    if (side == Black) return White;
+  static String opponent(String side) {
+    if (side == white) return black;
+    if (side == black) return white;
     return side;
   }
 }

src/ui/flutter/lib/mill/mill-recorder.dart

@@ -34,7 +34,7 @@ class MillRecorder {
 
     if (fullMove == 0) {
       fullMove++;
-    } else if (position.side != Side.Black) {
+    } else if (position.side != Side.black) {
       fullMove++;
     }
 

src/ui/flutter/lib/mill/position.dart

@@ -1,12 +1,11 @@
 import '../mill/mill-recorder.dart';
-
 import 'mill-base.dart';
 
 class Position {
   //
   BattleResult result = BattleResult.Pending;
 
-  String _side;
+  String _sideToMove;
   List<String> _board; // 8  *  3
   MillRecorder _recorder;
 
@@ -16,7 +15,7 @@ class Position {
 
   void initDefaultPosition() {
     //
-    _side = Side.Black;
+    _sideToMove = Side.black;
     _board = List<String>(40); // SQUARE_NB
 
     for (var i = 0; i < 40; i++) {
@@ -32,7 +31,7 @@ class Position {
 
     other._board.forEach((piece) => _board.add(piece));
 
-    _side = other._side;
+    _sideToMove = other._sideToMove;
 
     _recorder = other._recorder;
   }
@@ -52,7 +51,7 @@ class Position {
     _board[from] = Piece.Empty;
 
     // 交换走棋方
-    _side = Side.oppo(_side);
+    _sideToMove = Side.opponent(_sideToMove);
 
     return captured;
   }
@@ -60,7 +59,7 @@ class Position {
   // 验证移动棋子的着法是否合法
   bool validateMove(int from, int to) {
     // 移动的棋子的选手，应该是当前方
-    if (Side.of(_board[from]) != _side) return false;
+    if (Side.of(_board[from]) != _sideToMove) return false;
     return true;
     //(StepValidate.validate(this, Move(from, to)));
   }
@@ -74,7 +73,7 @@ class Position {
     _board[move.from] = Piece.Empty;
 
     // 交换走棋方
-    if (turnSide) _side = Side.oppo(_side);
+    if (turnSide) _sideToMove = Side.opponent(_sideToMove);
   }
 
   bool regret() {
@@ -85,7 +84,7 @@ class Position {
     _board[lastMove.from] = _board[lastMove.to];
     _board[lastMove.to] = lastMove.captured;
 
-    _side = Side.oppo(_side);
+    _sideToMove = Side.opponent(_sideToMove);
 
     final counterMarks = MillRecorder.fromCounterMarks(lastMove.counterMarks);
     _recorder.halfMove = counterMarks.halfMove;
@@ -102,7 +101,7 @@ class Position {
         tempPosition._board[move.from] = tempPosition._board[move.to];
         tempPosition._board[move.to] = move.captured;
 
-        tempPosition._side = Side.oppo(tempPosition._side);
+        tempPosition._sideToMove = Side.opponent(tempPosition._sideToMove);
       });
 
       _recorder.lastCapturedPosition = tempPosition.toFen();
@@ -171,9 +170,9 @@ class Position {
 
   get manualText => _recorder.buildManualText();
 
-  get side => _side;
+  get side => _sideToMove;
 
-  trunSide() => _side = Side.oppo(_side);
+  changeSideToMove() => _sideToMove = Side.opponent(_sideToMove);
 
   String pieceAt(int index) => _board[index];
 

src/ui/flutter/lib/routes/battle-page.dart

@@ -46,13 +46,13 @@ class _BattlePageState extends State<BattlePage> {
     final position = Battle.shared.position;
 
     // 仅 Position 中的 side 指示一方能动棋
-    if (position.side != Side.White) return;
+    if (position.side != Side.white) return;
 
     final tapedPiece = position.pieceAt(index);
 
     // 之前已经有棋子被选中了
     if (Battle.shared.focusIndex != Move.InvalidIndex &&
-        Side.of(position.pieceAt(Battle.shared.focusIndex)) == Side.White) {
+        Side.of(position.pieceAt(Battle.shared.focusIndex)) == Side.white) {
       //
       // 当前点击的棋子和之前已经选择的是同一个位置
       if (Battle.shared.focusIndex == index) return;