RemoteMediaClient tracksChooser pigeon

android/src/main/java/com/gianlucaparadise/flutter_cast_framework/PlatformBridgeApis.java

@@ -403,6 +403,7 @@ public class PlatformBridgeApis {
     void play();
     void pause();
     void stop();
+    void showTracksChooserDialog();
 
     /** The codec used by CastHostApi. */
     static MessageCodec<Object> getCodec() {
@@ -597,6 +598,25 @@ public class PlatformBridgeApis {
           channel.setMessageHandler(null);
         }
       }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(binaryMessenger, "dev.flutter.pigeon.CastHostApi.showTracksChooserDialog", getCodec());
+        if (api != null) {
+          channel.setMessageHandler((message, reply) -> {
+            Map<String, Object> wrapped = new HashMap<>();
+            try {
+              api.showTracksChooserDialog();
+              wrapped.put("result", null);
+            }
+            catch (Error | RuntimeException exception) {
+              wrapped.put("error", wrapError(exception));
+            }
+            reply.reply(wrapped);
+          });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
     }
   }
   private static class CastFlutterApiCodec extends StandardMessageCodec {

ios/Classes/PlatformBridgeApis.h

@@ -108,6 +108,7 @@ NSObject<FlutterMessageCodec> *CastHostApiGetCodec(void);
 - (void)playWithError:(FlutterError *_Nullable *_Nonnull)error;
 - (void)pauseWithError:(FlutterError *_Nullable *_Nonnull)error;
 - (void)stopWithError:(FlutterError *_Nullable *_Nonnull)error;
+- (void)showTracksChooserDialogWithError:(FlutterError *_Nullable *_Nonnull)error;
 @end
 
 extern void CastHostApiSetup(id<FlutterBinaryMessenger> binaryMessenger, NSObject<CastHostApi> *_Nullable api);

ios/Classes/PlatformBridgeApis.m

@@ -469,6 +469,24 @@ void CastHostApiSetup(id<FlutterBinaryMessenger> binaryMessenger, NSObject<CastH
       [channel setMessageHandler:nil];
     }
   }
+  {
+    FlutterBasicMessageChannel *channel =
+      [FlutterBasicMessageChannel
+        messageChannelWithName:@"dev.flutter.pigeon.CastHostApi.showTracksChooserDialog"
+        binaryMessenger:binaryMessenger
+        codec:CastHostApiGetCodec()];
+    if (api) {
+      NSCAssert([api respondsToSelector:@selector(showTracksChooserDialogWithError:)], @"CastHostApi api (%@) doesn't respond to @selector(showTracksChooserDialogWithError:)", api);
+      [channel setMessageHandler:^(id _Nullable message, FlutterReply callback) {
+        FlutterError *error;
+        [api showTracksChooserDialogWithError:&error];
+        callback(wrapResult(nil, error));
+      }];
+    }
+    else {
+      [channel setMessageHandler:nil];
+    }
+  }
 }
 @interface CastFlutterApiCodecReader : FlutterStandardReader
 @end

lib/src/PlatformBridgeApis.dart

@@ -500,6 +500,29 @@ class CastHostApi {
       return;
     }
   }
+
+  Future<void> showTracksChooserDialog() async {
+    final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
+        'dev.flutter.pigeon.CastHostApi.showTracksChooserDialog', codec, binaryMessenger: _binaryMessenger);
+    final Map<Object?, Object?>? replyMap =
+        await channel.send(null) as Map<Object?, Object?>?;
+    if (replyMap == null) {
+      throw PlatformException(
+        code: 'channel-error',
+        message: 'Unable to establish connection on channel.',
+        details: null,
+      );
+    } else if (replyMap['error'] != null) {
+      final Map<Object?, Object?> error = (replyMap['error'] as Map<Object?, Object?>?)!;
+      throw PlatformException(
+        code: (error['code'] as String?)!,
+        message: error['message'] as String?,
+        details: error['details'],
+      );
+    } else {
+      return;
+    }
+  }
 }
 
 class _CastFlutterApiCodec extends StandardMessageCodec {

lib/src/cast/RemoteMediaClient.dart

@@ -64,6 +64,11 @@ class RemoteMediaClient {
     return await _hostApi.getMediaInfo();
   }
 
+  /// A Dialog to show the available tracks (Text and Audio) for user to select.
+  void showTracksChooserDialog() {
+    _hostApi.showTracksChooserDialog();
+  }
+
   /// Internal method that shouldn't be visible
   @internal
   void dispatchPlayerStateUpdate(PlayerState playerState) {

lib/src/cast/widgets/expanded_controls/ExpandedControlsPlayer.dart

@@ -36,6 +36,11 @@ class _ExpandedControlsPlayerState extends State<ExpandedControlsPlayer> {
     });
   }
 
+  void _onClosedCaptionClicked() {
+    final sessionManager = widget.castFramework.castContext.sessionManager;
+    sessionManager.remoteMediaClient.showTracksChooserDialog();
+  }
+
   Widget _getIconButton(IconData icon, VoidCallback? onPressed) {
     return IconButton(
       padding: EdgeInsets.zero,
@@ -101,7 +106,7 @@ class _ExpandedControlsPlayerState extends State<ExpandedControlsPlayer> {
           return Row(
             mainAxisAlignment: MainAxisAlignment.spaceEvenly,
             children: [
-              _getIconButton(Icons.closed_caption, null),
+              _getIconButton(Icons.closed_caption, _onClosedCaptionClicked),
               _getIconButton(Icons.skip_previous, null),
               _getPlayPauseButton(playerState),
               _getIconButton(Icons.skip_next, null),

pigeon/PlatformBridgeApisDefinition.dart

@@ -236,6 +236,7 @@ abstract class CastHostApi {
   void play();
   void pause();
   void stop();
+  void showTracksChooserDialog();
   //endregion
 }