flutter: Support exporting game

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

@@ -212,6 +212,10 @@
   "@importGame": {
     "description": "Import game"
   },
+  "exportGame": "Spiel exportieren",
+  "@exportGame": {
+    "description": "Export game"
+  },
   "gameImported": "Spiel aus der Zwischenablage importiert.",
   "@gameImported": {
     "description": "Game imported from clipboard."

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

@@ -212,6 +212,10 @@
   "@importGame": {
     "description": "Import game"
   },
+  "exportGame": "Export game",
+  "@exportGame": {
+    "description": "Export game"
+  },
   "gameImported": "Game imported from clipboard.",
   "@gameImported": {
     "description": "Game imported from clipboard."

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

@@ -212,6 +212,10 @@
   "@importGame": {
     "description": "Import game"
   },
+  "exportGame": "صادرات بازی",
+  "@exportGame": {
+    "description": "Export game"
+  },
   "gameImported": "بازی از کلیپ بورد وارد شده است.",
   "@gameImported": {
     "description": "Game imported from clipboard."

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

@@ -52,7 +52,8 @@
   "thinking": "对方思考中...",
   "newGame": "开始新局",
   "startNewGame": "开始新局",
-  "importGame": "导入棋谱",
+  "importGame": "导入棋局",
+  "exportGame": "导出棋局",
   "gameImported": "棋谱已从剪贴板导入",
   "startRecording": "开始录制",
   "recording": "录制中...",

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

@@ -571,6 +571,16 @@ class _GamePageState extends State<GamePage>
     showTip(S.of(context).gameImported);
   }
 
+  onExportGameButtonPressed() async {
+    Navigator.of(context).pop();
+
+    final moveHistoryText = Game.instance.position.moveHistoryText;
+
+    Clipboard.setData(ClipboardData(text: moveHistoryText)).then((_) {
+      showSnackBar(S.of(context).moveHistoryCopied);
+    });
+  }
+
   /*
   onStartRecordingButtonPressed() async {
     Navigator.of(context).pop();
@@ -686,6 +696,15 @@ class _GamePageState extends State<GamePage>
               ),
               onPressed: onImportGameButtonPressed,
             ),
+            SizedBox(height: AppTheme.sizedBoxHeight),
+            SimpleDialogOption(
+              child: Text(
+                S.of(context).exportGame,
+                style: AppTheme.simpleDialogOptionTextStyle,
+                textAlign: TextAlign.center,
+              ),
+              onPressed: onExportGameButtonPressed,
+            ),
             /*
             SizedBox(height: AppTheme.sizedBoxHeight),
             Config.experimentsEnabled