Add accessibility scroll support to some widgets.

1. Added support for accessibility scroll action to
   some widgets that are scrollable.

2. Making the super call when handling an accessibility
   action in the views to call super first to allow
   an accessibility delegate to intercept the call.

bug:5932640

Change-Id: I5eb37d64bf9fba1d5c596981132e0df717e2a18a

1 files changed, 18 insertions, 0 deletions

diff --git a/core/java/android/widget/NumberPicker.java b/core/java/android/widget/NumberPicker.java
index 78d570e..b825e1b 100644
--- a/core/java/android/widget/NumberPicker.java
+++ b/core/java/android/widget/NumberPicker.java
@@ -2172,6 +2172,18 @@ public class NumberPicker extends LinearLayout {
                             }
                             return false;
                         }
+                        case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD: {
+                            if (getWrapSelectorWheel() || getValue() < getMaxValue()) {
+                                changeValueByOne(true);
+                                return true;
+                            }
+                        } return false;
+                        case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD: {
+                            if (getWrapSelectorWheel() || getValue() > getMinValue()) {
+                                changeValueByOne(false);
+                                return true;
+                            }
+                        } return false;
                     }
                 } break;
                 case VIRTUAL_VIEW_ID_INPUT: {
@@ -2497,6 +2509,12 @@ public class NumberPicker extends LinearLayout {
             if (mAccessibilityFocusedView == View.NO_ID) {
                 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
             }
+            if (getWrapSelectorWheel() || getValue() < getMaxValue()) {
+                info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD);
+            }
+            if (getWrapSelectorWheel() || getValue() > getMinValue()) {
+                info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD);
+            }
 
             return info;
         }