Expose room cells to voiceover on Home tab.

Riot/Modules/Home/Views/AccessibleCollectionView.swift

@@ -0,0 +1,37 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import UIKit
+
+/// A collection view that returns an accessibility element count equal to the number of
+/// items in its first section. This allows voiceover user to swipe through the entire collection.
+class AccessibleCollectionView: UICollectionView {
+    private var numberOfItemsInFirstSection = 0
+    
+    override func accessibilityElementCount() -> Int {
+        return numberOfItemsInFirstSection
+    }
+    
+    override func numberOfItems(inSection section: Int) -> Int {
+        let numberOfItems = super.numberOfItems(inSection: section)
+        
+        if section == 0 {
+            numberOfItemsInFirstSection = numberOfItems
+        }
+        
+        return numberOfItems
+    }
+}