From 79141a1236ebf9d540b72cd1bf1bc56d4b5fe954 Mon Sep 17 00:00:00 2001
From: Hyunyoung Song <hyunyoungs@google.com>
Date: Wed, 16 May 2018 15:54:31 -0700
Subject: [PATCH] Accessibility sugar for Recents

Adding various-pitch earcorns that depend on the scroll state and
position in the list notifications. This is for Talkback.

Bug: 72222505
Test: Manual
Change-Id: I99ffe553f7a20d057940197d97506bc1a14a193e
---
 .../android/quickstep/views/RecentsView.java  | 30 +++++++++++++++++++
 .../com/android/quickstep/views/TaskView.java |  8 ++++-
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index 0358028bc7..186de36814 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -54,7 +54,9 @@ import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewDebug;
+import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityNodeInfo;
+import android.widget.ListView;
 
 import com.android.launcher3.BaseActivity;
 import com.android.launcher3.DeviceProfile;
@@ -1334,6 +1336,34 @@ public abstract class RecentsView<T extends BaseActivity> extends PagedView impl
         }
     }
 
+    @Override
+    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
+        super.onInitializeAccessibilityNodeInfo(info);
+
+        final AccessibilityNodeInfo.CollectionInfo
+                collectionInfo = AccessibilityNodeInfo.CollectionInfo.obtain(
+                1, getChildCount(), false,
+                AccessibilityNodeInfo.CollectionInfo.SELECTION_MODE_NONE);
+        info.setCollectionInfo(collectionInfo);
+    }
+
+    @Override
+    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
+        super.onInitializeAccessibilityEvent(event);
+
+        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
+            event.setFromIndex(getCurrentPage());
+            event.setToIndex(getCurrentPage());
+            event.setItemCount(getChildCount());
+        }
+    }
+
+    @Override
+    public CharSequence getAccessibilityClassName() {
+        // To hear position-in-list related feedback from Talkback.
+        return ListView.class.getName();
+    }
+
     @Override
     protected boolean isPageOrderFlipped() {
         return true;
diff --git a/quickstep/src/com/android/quickstep/views/TaskView.java b/quickstep/src/com/android/quickstep/views/TaskView.java
index 0df0580fea..213d9cb592 100644
--- a/quickstep/src/com/android/quickstep/views/TaskView.java
+++ b/quickstep/src/com/android/quickstep/views/TaskView.java
@@ -320,7 +320,13 @@ public class TaskView extends FrameLayout implements TaskCallbacks, PageCallback
             }
         }
 
-        getRecentsView().addTaskAccessibilityActionsExtra(info);
+        final RecentsView recentsView = getRecentsView();
+        recentsView.addTaskAccessibilityActionsExtra(info);
+
+        final AccessibilityNodeInfo.CollectionItemInfo itemInfo =
+                AccessibilityNodeInfo.CollectionItemInfo.obtain(
+                        0, 1, recentsView.indexOfChild(this), 1, false);
+        info.setCollectionItemInfo(itemInfo);
     }
 
     @Override