From 6053088884171f67e2df253576eab116fd05b4fe Mon Sep 17 00:00:00 2001
From: alanv <alanv@google.com>
Date: Thu, 13 Sep 2012 14:02:29 -0700
Subject: [PATCH] Add accessibility scroll actions to TabWidget

Bug: 6537369
Change-Id: I8a5bf1d6f85f0ceef316aa4a5938d32a545587db
---
 core/java/android/widget/TabWidget.java | 37 +++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/core/java/android/widget/TabWidget.java b/core/java/android/widget/TabWidget.java
index 6bced1c6977a6..037110548caed 100644
--- a/core/java/android/widget/TabWidget.java
+++ b/core/java/android/widget/TabWidget.java
@@ -24,6 +24,7 @@ import android.graphics.Canvas;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
+import android.os.Bundle;
 import android.util.AttributeSet;
 import android.view.View;
 import android.view.View.OnFocusChangeListener;
@@ -434,6 +435,42 @@ public class TabWidget extends LinearLayout implements OnFocusChangeListener {
     public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
         super.onInitializeAccessibilityNodeInfo(info);
         info.setClassName(TabWidget.class.getName());
+
+        final int tabCount = getTabCount();
+
+        if (tabCount > 1) {
+            if (mSelectedTab > 0) {
+                info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD);
+                info.setScrollable(true);
+            }
+
+            if (mSelectedTab < (tabCount - 1)) {
+                info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD);
+                info.setScrollable(true);
+            }
+        }
+    }
+
+    @Override
+    public boolean performAccessibilityAction(int action, Bundle arguments) {
+        final int tabCount = getTabCount();
+
+        switch (action) {
+            case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD:
+                if ((tabCount > 1) && (mSelectedTab > 0)) {
+                    focusCurrentTab(mSelectedTab - 1);
+                    return true;
+                }
+                return false;
+            case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD:
+                if ((tabCount > 1) && (mSelectedTab < (tabCount - 1))) {
+                    focusCurrentTab(mSelectedTab + 1);
+                    return true;
+                }
+                return false;
+        }
+
+        return super.performAccessibilityAction(action, arguments);
     }
 
     /**