Scroll breadcrumbs to top when opened

CHANGES.md

@@ -11,7 +11,7 @@ Other changes:
  -
 
 Bugfix 🐛:
- -
+ - Scroll breadcrumbs to top when opened
 
 Translations 🗣:
  -

vector/src/main/java/im/vector/riotx/features/home/room/breadcrumbs/BreadcrumbsFragment.kt

@@ -65,4 +65,8 @@ class BreadcrumbsFragment @Inject constructor(
     override fun onBreadcrumbClicked(roomId: String) {
         sharedActionViewModel.post(RoomDetailSharedAction.SwitchToRoom(roomId))
     }
+
+    fun scrollToTop() {
+        breadcrumbsRecyclerView.scrollToPosition(0)
+    }
 }

vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailActivity.kt

@@ -86,9 +86,19 @@ class RoomDetailActivity : VectorBaseActivity(), ToolbarConfigurable {
     private val drawerListener = object : DrawerLayout.SimpleDrawerListener() {
         override fun onDrawerStateChanged(newState: Int) {
             hideKeyboard()
+
+            if (!drawerLayout.isDrawerOpen(GravityCompat.START) && newState == DrawerLayout.STATE_DRAGGING) {
+                // User is starting to open the drawer, scroll the list to op
+                scrollBreadcrumbsToTop()
+            }
         }
     }
 
+    private fun scrollBreadcrumbsToTop() {
+        supportFragmentManager.fragments.filterIsInstance<BreadcrumbsFragment>()
+                .forEach { it.scrollToTop() }
+    }
+
     override fun onBackPressed() {
         if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
             drawerLayout.closeDrawer(GravityCompat.START)