Listen for MTU value setting changes

1 files changed, 22 insertions, 0 deletions

diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/ui/AdvancedFragment.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/ui/AdvancedFragment.kt
index 325c6e3b8a..8d623d3343 100644
--- a/android/src/main/kotlin/net/mullvad/mullvadvpn/ui/AdvancedFragment.kt
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/ui/AdvancedFragment.kt
@@ -5,7 +5,12 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.TextView
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import net.mullvad.mullvadvpn.R
+import net.mullvad.mullvadvpn.model.Settings
 
 private const val MIN_MTU_VALUE = 1280
 private const val MAX_MTU_VALUE = 1420
@@ -13,6 +18,9 @@ private const val MAX_MTU_VALUE = 1420
 class AdvancedFragment : ServiceDependentFragment(OnNoService.GoBack) {
     private lateinit var wireguardMtuInput: CellInput
 
+    private var subscriptionId: Int? = null
+    private var updateUiJob: Job? = null
+
     override fun onSafelyCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
@@ -37,6 +45,20 @@ class AdvancedFragment : ServiceDependentFragment(OnNoService.GoBack) {
             text = context.getString(R.string.wireguard_mtu_footer, MIN_MTU_VALUE, MAX_MTU_VALUE)
         }
 
+        settingsListener.subscribe({ settings -> updateUi(settings) })
+
         return view
     }
+
+    private fun updateUi(settings: Settings) {
+        updateUiJob?.cancel()
+        updateUiJob = GlobalScope.launch(Dispatchers.Main) {
+            wireguardMtuInput.value = settings.tunnelOptions.wireguard.mtu
+        }
+    }
+
+    override fun onSafelyDestroyView() {
+        subscriptionId?.let { id -> settingsListener.unsubscribe(id) }
+        updateUiJob?.cancel()
+    }
 }