For 9640 - Focus on last selected tab in tab tray with a11y turned on (#11487)

app/src/main/java/org/mozilla/fenix/tabtray/TabTrayDialogFragment.kt

@@ -110,7 +110,8 @@ class TabTrayDialogFragment : AppCompatDialogFragment(), TabTrayInteractor {
             view.tabLayout,
             this,
             isPrivate,
-            requireContext().resources.configuration.orientation == Configuration.ORIENTATION_LANDSCAPE
+            requireContext().resources.configuration.orientation == Configuration.ORIENTATION_LANDSCAPE,
+            viewLifecycleOwner.lifecycleScope
         ) { tabsFeature.get()?.filterTabs(it) }
 
         tabsFeature.set(

app/src/main/java/org/mozilla/fenix/tabtray/TabTrayView.kt

@@ -8,14 +8,19 @@ import android.content.Context
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.accessibility.AccessibilityEvent
 import androidx.cardview.widget.CardView
 import androidx.core.content.ContextCompat
 import androidx.core.view.isVisible
+import androidx.lifecycle.LifecycleCoroutineScope
 import com.google.android.material.bottomsheet.BottomSheetBehavior
 import com.google.android.material.tabs.TabLayout
 import kotlinx.android.extensions.LayoutContainer
 import kotlinx.android.synthetic.main.component_tabstray.view.*
 import kotlinx.android.synthetic.main.component_tabstray_fab.view.*
+import kotlinx.coroutines.Dispatchers.Main
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
 import mozilla.components.browser.menu.BrowserMenuBuilder
 import mozilla.components.browser.menu.item.SimpleBrowserMenuItem
 import mozilla.components.browser.state.selector.normalTabs
@@ -37,11 +42,13 @@ interface TabTrayInteractor {
 /**
  * View that contains and configures the BrowserAwesomeBar
  */
+@Suppress("LongParameterList")
 class TabTrayView(
     private val container: ViewGroup,
     private val interactor: TabTrayInteractor,
     isPrivate: Boolean,
     startingInLandscape: Boolean,
+    lifecycleScope: LifecycleCoroutineScope,
     private val filterTabs: ((TabSessionState) -> Boolean) -> Unit
 ) : LayoutContainer, TabLayout.OnTabSelectedListener {
     val fabView = LayoutInflater.from(container.context)
@@ -118,6 +125,19 @@ class TabTrayView(
                     if (!hasLoaded) {
                         hasLoaded = true
                         tray.layoutManager?.scrollToPosition(selectedBrowserTabIndex)
+                        if (view.context.settings().accessibilityServicesEnabled) {
+                            lifecycleScope.launch {
+                                delay(SELECTION_DELAY.toLong())
+                                lifecycleScope.launch(Main) {
+                                    tray.layoutManager?.findViewByPosition(selectedBrowserTabIndex)
+                                        ?.requestFocus()
+                                    tray.layoutManager?.findViewByPosition(selectedBrowserTabIndex)
+                                        ?.sendAccessibilityEvent(
+                                            AccessibilityEvent.TYPE_VIEW_FOCUSED
+                                        )
+                                }
+                            }
+                        }
                     }
                 }
             }
@@ -229,6 +249,7 @@ class TabTrayView(
         private const val PRIVATE_TAB_ID = 1
         private const val EXPAND_AT_SIZE = 3
         private const val SLIDE_OFFSET = 0
+        private const val SELECTION_DELAY = 500
     }
 }
 

app/src/main/res/layout/tab_tray_item.xml

@@ -7,7 +7,9 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/tab_item"
     android:layout_width="match_parent"
-    android:layout_height="88dp">
+    android:layout_height="88dp"
+    android:focusable="true"
+    android:focusableInTouchMode="true">
 
     <ImageButton
         android:id="@+id/play_pause_button"