dispaly gecko version in about dialog

packages/flutter_mozilla_components/android/src/main/kotlin/eu/weblibre/flutter_mozilla_components/api/GeckoBrowserApiImpl.kt

@@ -52,6 +52,7 @@ import mozilla.components.support.base.log.Log
 import mozilla.components.support.base.log.sink.AndroidLogSink
 import mozilla.components.support.base.log.sink.LogSink
 import org.mozilla.gecko.util.ThreadUtils.runOnUiThread
+import org.mozilla.geckoview.BuildConfig as GeckoViewBuildConfig
 
 class PriorityAwareLogSink(
     private val minLogPriority: Log.Priority,
@@ -135,6 +136,10 @@ class GeckoBrowserApiImpl : GeckoBrowserApi {
         isPlatformViewRegistered = false
     }
 
+    override fun getGeckoVersion(): String {
+        return GeckoViewBuildConfig.MOZ_APP_VERSION + "-" + GeckoViewBuildConfig.MOZ_APP_BUILDID
+    }
+
     override fun initialize(logLevel: LogLevel, contentBlocking: ContentBlocking) {
         synchronized(this) {
             if(!isGeckoInitialized) {

packages/flutter_mozilla_components/android/src/main/kotlin/eu/weblibre/flutter_mozilla_components/pigeons/Gecko.g.kt

@@ -2648,6 +2648,7 @@ private open class GeckoPigeonCodec : StandardMessageCodec() {
 
 /** Generated interface from Pigeon that represents a handler of messages from Flutter. */
 interface GeckoBrowserApi {
+  fun getGeckoVersion(): String
   fun initialize(logLevel: LogLevel, contentBlocking: ContentBlocking)
   fun showNativeFragment(): Boolean
   fun onTrimMemory(level: Long)
@@ -2661,6 +2662,21 @@ interface GeckoBrowserApi {
     @JvmOverloads
     fun setUp(binaryMessenger: BinaryMessenger, api: GeckoBrowserApi?, messageChannelSuffix: String = "") {
       val separatedMessageChannelSuffix = if (messageChannelSuffix.isNotEmpty()) ".$messageChannelSuffix" else ""
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.flutter_mozilla_components.GeckoBrowserApi.getGeckoVersion$separatedMessageChannelSuffix", codec)
+        if (api != null) {
+          channel.setMessageHandler { _, reply ->
+            val wrapped: List<Any?> = try {
+              listOf(api.getGeckoVersion())
+            } catch (exception: Throwable) {
+              GeckoPigeonUtils.wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
       run {
         val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.flutter_mozilla_components.GeckoBrowserApi.initialize$separatedMessageChannelSuffix", codec)
         if (api != null) {

packages/flutter_mozilla_components/lib/src/domain/services/gecko_browser.dart

@@ -13,6 +13,10 @@ class GeckoBrowserService {
 
   GeckoBrowserService({GeckoBrowserApi? api}) : _api = api ?? _apiInstance;
 
+  Future<String> getGeckoVersion() {
+    return _api.getGeckoVersion();
+  }
+
   Future<void> initialize(LogLevel logLevel, ContentBlocking contentBlocking) {
     return _api.initialize(logLevel, contentBlocking);
   }

packages/flutter_mozilla_components/lib/src/pigeons/gecko.g.dart

@@ -3007,6 +3007,34 @@ class GeckoBrowserApi {
 
   final String pigeonVar_messageChannelSuffix;
 
+  Future<String> getGeckoVersion() async {
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.flutter_mozilla_components.GeckoBrowserApi.getGeckoVersion$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(null);
+    final List<Object?>? pigeonVar_replyList =
+        await pigeonVar_sendFuture as List<Object?>?;
+    if (pigeonVar_replyList == null) {
+      throw _createConnectionError(pigeonVar_channelName);
+    } else if (pigeonVar_replyList.length > 1) {
+      throw PlatformException(
+        code: pigeonVar_replyList[0]! as String,
+        message: pigeonVar_replyList[1] as String?,
+        details: pigeonVar_replyList[2],
+      );
+    } else if (pigeonVar_replyList[0] == null) {
+      throw PlatformException(
+        code: 'null-error',
+        message: 'Host platform returned null value for non-null return value.',
+      );
+    } else {
+      return (pigeonVar_replyList[0] as String?)!;
+    }
+  }
+
   Future<void> initialize(LogLevel logLevel, ContentBlocking contentBlocking) async {
     final String pigeonVar_channelName = 'dev.flutter.pigeon.flutter_mozilla_components.GeckoBrowserApi.initialize$pigeonVar_messageChannelSuffix';
     final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(

packages/flutter_mozilla_components/pigeons/gecko.dart

@@ -838,6 +838,7 @@ enum LogLevel { debug, info, warn, error }
 )
 @HostApi()
 abstract class GeckoBrowserApi {
+  String getGeckoVersion();
   void initialize(LogLevel logLevel, ContentBlocking contentBlocking);
   bool showNativeFragment();
   void onTrimMemory(int level);