Make sure ThreadFragment is displayed after rotation

Author: KevinBoulongne

app/src/main/java/com/infomaniak/mail/ui/main/folder/TwoPaneFragment.kt

@@ -82,10 +82,13 @@ abstract class TwoPaneFragment : Fragment() {
     override fun onConfigurationChanged(newConfig: Configuration) {
         super.onConfigurationChanged(newConfig)
         updateDrawerLockMode()
+        ensureThreadIsDisplayed(newConfig.orientation)
     }
 
     private fun setupSlidingPane() = with(slidingPaneLayout) {
+
         lockMode = SlidingPaneLayout.LOCK_MODE_LOCKED
+
         addPanelSlideListener(object : SlidingPaneLayout.PanelSlideListener {
             override fun onPanelOpened(panel: View) = Unit
             override fun onPanelClosed(panel: View) = Unit
@@ -192,4 +195,10 @@ abstract class TwoPaneFragment : Fragment() {
             )
         }
     }
+
+    private fun ensureThreadIsDisplayed(orientation: Int) {
+        if (orientation == Configuration.ORIENTATION_PORTRAIT && twoPaneViewModel.isInThreadInPhoneMode(requireContext())) {
+            slidingPaneLayout.openPaneNoAnimation()
+        }
+    }
 }