Add CONTENT_CHANGE_TYPE_ENABLED flag

Bug: 191884508
Test: ran cts tests and verified on talkback_tests
Change-Id: I38b56c034e3291b4c11b79066be694c962c48e97

3 files changed, 17 insertions, 0 deletions

diff --git a/core/api/current.txt b/core/api/current.txt
index 00a28f2a8cf4..680a3dbc1174 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -51754,6 +51754,7 @@ package android.view.accessibility {
     field public static final int CONTENT_CHANGE_TYPE_DRAG_CANCELLED = 512; // 0x200
     field public static final int CONTENT_CHANGE_TYPE_DRAG_DROPPED = 256; // 0x100
     field public static final int CONTENT_CHANGE_TYPE_DRAG_STARTED = 128; // 0x80
+    field public static final int CONTENT_CHANGE_TYPE_ENABLED = 4096; // 0x1000
     field public static final int CONTENT_CHANGE_TYPE_ERROR = 2048; // 0x800
     field public static final int CONTENT_CHANGE_TYPE_PANE_APPEARED = 16; // 0x10
     field public static final int CONTENT_CHANGE_TYPE_PANE_DISAPPEARED = 32; // 0x20
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index 48937770eddb..ab1758640c7d 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -12454,6 +12454,8 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
         if (!enabled) {
             cancelPendingInputEvents();
         }
+        notifyViewAccessibilityStateChangedIfNeeded(
+                AccessibilityEvent.CONTENT_CHANGE_TYPE_ENABLED);
     }
 
     /**
diff --git a/core/java/android/view/accessibility/AccessibilityEvent.java b/core/java/android/view/accessibility/AccessibilityEvent.java
index 1d4af51fc4dd..7dd512369e7c 100644
--- a/core/java/android/view/accessibility/AccessibilityEvent.java
+++ b/core/java/android/view/accessibility/AccessibilityEvent.java
@@ -707,6 +707,18 @@ public final class AccessibilityEvent extends AccessibilityRecord implements Par
      */
     public static final int CONTENT_CHANGE_TYPE_ERROR = 0x0000800;
 
+    /**
+     * Change type for {@link #TYPE_WINDOW_CONTENT_CHANGED} event:
+     * The source node changed its ability to interact returned by
+     * {@link AccessibilityNodeInfo#isEnabled}.
+     * The view changing content's ability to interact should call
+     * {@link AccessibilityNodeInfo#setEnabled} and then send this event.
+     *
+     * @see AccessibilityNodeInfo#isEnabled
+     * @see AccessibilityNodeInfo#setEnabled
+     */
+    public static final int CONTENT_CHANGE_TYPE_ENABLED = 1 << 12;
+
     /** Change type for {@link #TYPE_SPEECH_STATE_CHANGE} event: another service is speaking. */
     public static final int SPEECH_STATE_SPEAKING_START = 0x00000001;
 
@@ -834,6 +846,7 @@ public final class AccessibilityEvent extends AccessibilityRecord implements Par
                 CONTENT_CHANGE_TYPE_DRAG_CANCELLED,
                 CONTENT_CHANGE_TYPE_CONTENT_INVALID,
                 CONTENT_CHANGE_TYPE_ERROR,
+                CONTENT_CHANGE_TYPE_ENABLED,
             })
     public @interface ContentChangeTypes {}
 
@@ -1103,6 +1116,7 @@ public final class AccessibilityEvent extends AccessibilityRecord implements Par
             case CONTENT_CHANGE_TYPE_CONTENT_INVALID:
                 return "CONTENT_CHANGE_TYPE_CONTENT_INVALID";
             case CONTENT_CHANGE_TYPE_ERROR: return "CONTENT_CHANGE_TYPE_ERROR";
+            case CONTENT_CHANGE_TYPE_ENABLED: return "CONTENT_CHANGE_TYPE_ENABLED";
             default: return Integer.toHexString(type);
         }
     }