[fenix] For https://github.com/mozilla-mobile/fenix/issues/18009: Correctly report items in adapter for a11y services.

app/src/main/java/org/mozilla/fenix/home/sessioncontrol/viewholders/TopSiteViewHolder.kt

@@ -11,6 +11,7 @@ import mozilla.components.feature.top.sites.TopSite
 import org.mozilla.fenix.R
 import org.mozilla.fenix.home.sessioncontrol.TopSiteInteractor
 import org.mozilla.fenix.home.sessioncontrol.viewholders.topsites.TopSitesAdapter
+import org.mozilla.fenix.utils.AccessibilityGridLayoutManager
 
 class TopSiteViewHolder(
     view: View,
@@ -20,8 +21,12 @@ class TopSiteViewHolder(
     private val topSitesAdapter = TopSitesAdapter(interactor)
 
     init {
+        val gridLayoutManager =
+            AccessibilityGridLayoutManager(view.context, SPAN_COUNT)
+
         view.top_sites_list.apply {
             adapter = topSitesAdapter
+            layoutManager = gridLayoutManager
         }
     }
 
@@ -31,5 +36,6 @@ class TopSiteViewHolder(
 
     companion object {
         const val LAYOUT_ID = R.layout.component_top_sites
+        const val SPAN_COUNT = 4
     }
 }

app/src/main/java/org/mozilla/fenix/utils/AccessibilityGridLayoutManager.kt

@@ -0,0 +1,32 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.fenix.utils
+
+import android.content.Context
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+
+/**
+ * A GridLayoutManager that can be used to override methods in Android implementation
+ * to improve ayy1 or fix a11y issues.
+ */
+class AccessibilityGridLayoutManager(
+    context: Context,
+    spanCount: Int
+) : GridLayoutManager(
+    context,
+    spanCount
+) {
+    override fun getColumnCountForAccessibility(
+        recycler: RecyclerView.Recycler,
+        state: RecyclerView.State
+    ): Int {
+        return if (itemCount < spanCount) {
+            itemCount
+        } else {
+            super.getColumnCountForAccessibility(recycler, state)
+        }
+    }
+}

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

@@ -24,7 +24,7 @@ to keep layout_width="match_parent"-->
         android:clipToPadding="false"
         android:overScrollMode="never"
         android:nestedScrollingEnabled="false"
-        app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
-        app:spanCount="4"
+        tools:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
+        tools:spanCount="4"
         tools:listitem="@layout/top_site_item" />
 </LinearLayout>