pipe gecko logs to flutter

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

@@ -27,6 +27,7 @@ import eu.weblibre.flutter_mozilla_components.pigeons.GeckoDownloadsApi
 import eu.weblibre.flutter_mozilla_components.pigeons.GeckoEngineSettingsApi
 import eu.weblibre.flutter_mozilla_components.pigeons.GeckoFindApi
 import eu.weblibre.flutter_mozilla_components.pigeons.GeckoIconsApi
+import eu.weblibre.flutter_mozilla_components.pigeons.GeckoLogging
 import eu.weblibre.flutter_mozilla_components.pigeons.GeckoMlApi
 import eu.weblibre.flutter_mozilla_components.pigeons.GeckoPrefApi
 import eu.weblibre.flutter_mozilla_components.pigeons.GeckoSelectionActionController
@@ -44,13 +45,15 @@ import io.flutter.embedding.engine.plugins.FlutterPlugin
 import io.flutter.embedding.engine.plugins.FlutterPlugin.FlutterPluginBinding
 import mozilla.components.browser.state.action.SystemAction
 import mozilla.components.feature.addons.logger
+import mozilla.components.support.base.ext.getStacktraceAsString
 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
 
 class PriorityAwareLogSink(
     private val minLogPriority: Log.Priority,
-    private val androidLogSink: LogSink,
+    private val geckoLogging: GeckoLogging
 ) : LogSink {
 
     override fun log(
@@ -63,7 +66,22 @@ class PriorityAwareLogSink(
             return
         }
 
-        androidLogSink.log(priority, tag, throwable, message)
+        val level = when(priority) {
+            Log.Priority.DEBUG -> LogLevel.DEBUG
+            Log.Priority.INFO -> LogLevel.INFO
+            Log.Priority.WARN -> LogLevel.WARN
+            Log.Priority.ERROR -> LogLevel.ERROR
+        };
+
+        val logMessage: String = if (throwable != null) {
+            "$message\n${throwable.getStacktraceAsString()}"
+        } else {
+            message
+        }
+
+        runOnUiThread {
+            geckoLogging.onLog(level, logMessage) { _ -> }
+        }
     }
 }
 
@@ -118,6 +136,8 @@ class GeckoBrowserApiImpl : GeckoBrowserApi {
     override fun initialize(logLevel: LogLevel) {
         synchronized(this) {
             if(!isGeckoInitialized) {
+                val geckoLogging = GeckoLogging(_flutterPluginBinding.binaryMessenger)
+
                 val level = when(logLevel) {
                     LogLevel.DEBUG -> Log.Priority.DEBUG
                     LogLevel.INFO -> Log.Priority.INFO
@@ -125,7 +145,7 @@ class GeckoBrowserApiImpl : GeckoBrowserApi {
                     LogLevel.ERROR -> Log.Priority.ERROR
                 };
 
-                Log.addSink(PriorityAwareLogSink(level, AndroidLogSink("WebLibre")))
+                Log.addSink(PriorityAwareLogSink(level, geckoLogging))
 
                 setupGeckoEngine(level)
                 isGeckoInitialized = true

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

@@ -3999,6 +3999,32 @@ class GeckoStateEvents(private val binaryMessenger: BinaryMessenger, private val
     }
   }
 }
+/** Generated class from Pigeon that represents Flutter messages that can be called from Kotlin. */
+class GeckoLogging(private val binaryMessenger: BinaryMessenger, private val messageChannelSuffix: String = "") {
+  companion object {
+    /** The codec used by GeckoLogging. */
+    val codec: MessageCodec<Any?> by lazy {
+      GeckoPigeonCodec()
+    }
+  }
+  fun onLog(levelArg: LogLevel, messageArg: String, callback: (Result<Unit>) -> Unit)
+{
+    val separatedMessageChannelSuffix = if (messageChannelSuffix.isNotEmpty()) ".$messageChannelSuffix" else ""
+    val channelName = "dev.flutter.pigeon.flutter_mozilla_components.GeckoLogging.onLog$separatedMessageChannelSuffix"
+    val channel = BasicMessageChannel<Any?>(binaryMessenger, channelName, codec)
+    channel.send(listOf(levelArg, messageArg)) {
+      if (it is List<*>) {
+        if (it.size > 1) {
+          callback(Result.failure(FlutterError(it[0] as String, it[1] as String, it[2] as String?)))
+        } else {
+          callback(Result.success(Unit))
+        }
+      } else {
+        callback(Result.failure(GeckoPigeonUtils.createConnectionError(channelName)))
+      } 
+    }
+  }
+}
 /** Generated interface from Pigeon that represents a handler of messages from Flutter. */
 interface ReaderViewEvents {
   fun onToggleReaderView(enable: Boolean)