Revert "Remove obsolete workaround for ClickableSpan a11y"

This commit breaks ub-setupwizard-master build

Test: ./gradlew connectedAndroidTest test
This reverts commit 1dcf260b55.

library/gingerbread/src/com/android/setupwizardlib/util/LinkAccessibilityHelper.java

@@ -16,21 +16,14 @@
 
 package com.android.setupwizardlib.util;
 
-import static android.support.v4.os.BuildCompat.isAtLeastO;
-
 import android.graphics.Rect;
 import android.os.Bundle;
-import android.support.v4.view.AccessibilityDelegateCompat;
 import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
-import android.support.v4.view.accessibility.AccessibilityNodeProviderCompat;
 import android.support.v4.widget.ExploreByTouchHelper;
 import android.text.Layout;
 import android.text.Spanned;
 import android.text.style.ClickableSpan;
 import android.util.Log;
-import android.view.MotionEvent;
-import android.view.View;
-import android.view.ViewGroup;
 import android.view.accessibility.AccessibilityEvent;
 import android.widget.TextView;
 
@@ -39,10 +32,6 @@ import java.util.List;
 /**
  * An accessibility delegate that allows {@link android.text.style.ClickableSpan} to be focused and
  * clicked by accessibility services.
- * <p>
- * <strong>Note: </strong> From Android O on, there is native support for ClickableSpan
- * accessibility, so this class is not needed (and indeed has no effect.)
- * </p>
  *
  * <p />Sample usage:
  * <pre>
@@ -65,135 +54,19 @@ import java.util.List;
  * @see com.android.setupwizardlib.view.RichTextView
  * @see android.support.v4.widget.ExploreByTouchHelper
  */
-public class LinkAccessibilityHelper extends AccessibilityDelegateCompat {
+public class LinkAccessibilityHelper extends ExploreByTouchHelper {
 
     private static final String TAG = "LinkAccessibilityHelper";
 
     private final TextView mView;
     private final Rect mTempRect = new Rect();
-    private final ExploreByTouchHelper mExploreByTouchHelper;
 
     public LinkAccessibilityHelper(TextView view) {
-        if (!isAtLeastO()) {
-            // Pre-O, we essentially extend ExploreByTouchHelper to expose a virtual view hierarchy
-            mExploreByTouchHelper = new ExploreByTouchHelper(view) {
-                @Override
-                protected int getVirtualViewAt(float x, float y) {
-                    return this.getVirtualViewAt(x, y);
-                }
-
-                @Override
-                protected void getVisibleVirtualViews(List<Integer> virtualViewIds) {
-                    this.getVisibleVirtualViews(virtualViewIds);
-                }
-
-                @Override
-                protected void onPopulateEventForVirtualView(int virtualViewId,
-                        AccessibilityEvent event) {
-                    this.onPopulateEventForVirtualView(virtualViewId, event);
-                }
-
-                @Override
-                protected void onPopulateNodeForVirtualView(int virtualViewId,
-                        AccessibilityNodeInfoCompat infoCompat) {
-                    this.onPopulateNodeForVirtualView(virtualViewId, infoCompat);
-
-                }
-
-                @Override
-                protected boolean onPerformActionForVirtualView(int virtualViewId, int action,
-                        Bundle arguments) {
-                    return this.onPerformActionForVirtualView(virtualViewId, action, arguments);
-                }
-            };
-        } else {
-            mExploreByTouchHelper = null;
-        }
+        super(view);
         mView = view;
     }
 
     @Override
-    public void sendAccessibilityEvent(View host, int eventType) {
-        if (mExploreByTouchHelper != null) {
-            mExploreByTouchHelper.sendAccessibilityEvent(host, eventType);
-        } else {
-            super.sendAccessibilityEvent(host, eventType);
-        }
-    }
-
-    @Override
-    public void sendAccessibilityEventUnchecked(View host, AccessibilityEvent event) {
-        if (mExploreByTouchHelper != null) {
-            mExploreByTouchHelper.sendAccessibilityEventUnchecked(host, event);
-        } else {
-            super.sendAccessibilityEventUnchecked(host, event);
-        }
-    }
-
-    @Override
-    public boolean dispatchPopulateAccessibilityEvent(View host, AccessibilityEvent event) {
-        return (mExploreByTouchHelper != null)
-                ? mExploreByTouchHelper.dispatchPopulateAccessibilityEvent(host, event)
-                : super.dispatchPopulateAccessibilityEvent(host, event);
-    }
-
-    @Override
-    public void onPopulateAccessibilityEvent(View host, AccessibilityEvent event) {
-        if (mExploreByTouchHelper != null) {
-            mExploreByTouchHelper.onPopulateAccessibilityEvent(host, event);
-        } else {
-            super.onPopulateAccessibilityEvent(host, event);
-        }
-    }
-
-    @Override
-    public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) {
-        if (mExploreByTouchHelper != null) {
-            mExploreByTouchHelper.onInitializeAccessibilityEvent(host, event);
-        } else {
-            super.onInitializeAccessibilityEvent(host, event);
-        }
-    }
-
-    @Override
-    public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
-        if (mExploreByTouchHelper != null) {
-            mExploreByTouchHelper.onInitializeAccessibilityNodeInfo(host, info);
-        } else {
-            super.onInitializeAccessibilityNodeInfo(host, info);
-        }
-    }
-
-    @Override
-    public boolean onRequestSendAccessibilityEvent(ViewGroup host, View child,
-            AccessibilityEvent event) {
-        return (mExploreByTouchHelper != null)
-                ? mExploreByTouchHelper.onRequestSendAccessibilityEvent(host, child, event)
-                : super.onRequestSendAccessibilityEvent(host, child, event);
-    }
-
-    @Override
-    public AccessibilityNodeProviderCompat getAccessibilityNodeProvider(View host) {
-        return (mExploreByTouchHelper != null)
-                ? mExploreByTouchHelper.getAccessibilityNodeProvider(host)
-                : super.getAccessibilityNodeProvider(host);
-    }
-
-    @Override
-    public boolean performAccessibilityAction(View host, int action, Bundle args) {
-        return (mExploreByTouchHelper != null)
-                ? mExploreByTouchHelper.performAccessibilityAction(host, action, args)
-                : super.performAccessibilityAction(host, action, args);
-    }
-
-    /**
-     * Delegated to {@link ExploreByTouchHelper}
-     */
-    public final boolean dispatchHoverEvent(MotionEvent event) {
-        return (mExploreByTouchHelper != null) ? mExploreByTouchHelper.dispatchHoverEvent(event)
-                : false;
-    }
-
     protected int getVirtualViewAt(float x, float y) {
         final CharSequence text = mView.getText();
         if (text instanceof Spanned) {
@@ -205,9 +78,10 @@ public class LinkAccessibilityHelper extends AccessibilityDelegateCompat {
                 return spannedText.getSpanStart(linkSpan);
             }
         }
-        return ExploreByTouchHelper.INVALID_ID;
+        return INVALID_ID;
     }
 
+    @Override
     protected void getVisibleVirtualViews(List<Integer> virtualViewIds) {
         final CharSequence text = mView.getText();
         if (text instanceof Spanned) {
@@ -220,6 +94,7 @@ public class LinkAccessibilityHelper extends AccessibilityDelegateCompat {
         }
     }
 
+    @Override
     protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
         final ClickableSpan span = getSpanForOffset(virtualViewId);
         if (span != null) {
@@ -230,6 +105,7 @@ public class LinkAccessibilityHelper extends AccessibilityDelegateCompat {
         }
     }
 
+    @Override
     protected void onPopulateNodeForVirtualView(int virtualViewId,
             AccessibilityNodeInfoCompat info) {
         final ClickableSpan span = getSpanForOffset(virtualViewId);
@@ -250,6 +126,7 @@ public class LinkAccessibilityHelper extends AccessibilityDelegateCompat {
         info.addAction(AccessibilityNodeInfoCompat.ACTION_CLICK);
     }
 
+    @Override
     protected boolean onPerformActionForVirtualView(int virtualViewId, int action,
             Bundle arguments) {
         if (action == AccessibilityNodeInfoCompat.ACTION_CLICK) {

library/gingerbread/test/instrumentation/src/com/android/setupwizardlib/test/LinkAccessibilityHelperTest.java

@@ -16,8 +16,6 @@
 
 package com.android.setupwizardlib.test;
 
-import static android.support.v4.os.BuildCompat.isAtLeastO;
-
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
@@ -59,7 +57,6 @@ public class LinkAccessibilityHelperTest {
 
     @Test
     public void testGetVirtualViewAt() {
-        if (isAtLeastO()) return;
         initTextView();
         final int virtualViewId = mHelper.getVirtualViewAt(dp2Px(15), dp2Px(10));
         assertEquals("Virtual view ID should be 1", 1, virtualViewId);
@@ -67,7 +64,6 @@ public class LinkAccessibilityHelperTest {
 
     @Test
     public void testGetVirtualViewAtHost() {
-        if (isAtLeastO()) return;
         initTextView();
         final int virtualViewId = mHelper.getVirtualViewAt(dp2Px(100), dp2Px(100));
         assertEquals("Virtual view ID should be INVALID_ID",
@@ -76,7 +72,6 @@ public class LinkAccessibilityHelperTest {
 
     @Test
     public void testGetVisibleVirtualViews() {
-        if (isAtLeastO()) return;
         initTextView();
         List<Integer> virtualViewIds = new ArrayList<>();
         mHelper.getVisibleVirtualViews(virtualViewIds);
@@ -87,7 +82,6 @@ public class LinkAccessibilityHelperTest {
 
     @Test
     public void testOnPopulateEventForVirtualView() {
-        if (isAtLeastO()) return;
         initTextView();
         AccessibilityEvent event = AccessibilityEvent.obtain();
         mHelper.onPopulateEventForVirtualView(1, event);
@@ -101,7 +95,6 @@ public class LinkAccessibilityHelperTest {
 
     @Test
     public void testOnPopulateEventForVirtualViewHost() {
-        if (isAtLeastO()) return;
         initTextView();
         AccessibilityEvent event = AccessibilityEvent.obtain();
         mHelper.onPopulateEventForVirtualView(ExploreByTouchHelper.INVALID_ID, event);
@@ -114,7 +107,6 @@ public class LinkAccessibilityHelperTest {
 
     @Test
     public void testOnPopulateNodeForVirtualView() {
-        if (isAtLeastO()) return;
         initTextView();
         AccessibilityNodeInfoCompat info = AccessibilityNodeInfoCompat.obtain();
         mHelper.onPopulateNodeForVirtualView(1, info);
@@ -133,7 +125,6 @@ public class LinkAccessibilityHelperTest {
 
     @Test
     public void testNullLayout() {
-        if (isAtLeastO()) return;
         initTextView();
         // Setting the padding will cause the layout to be null-ed out.
         mTextView.setPadding(1, 1, 1, 1);
@@ -151,7 +142,6 @@ public class LinkAccessibilityHelperTest {
 
     @Test
     public void testRtlLayout() {
-        if (isAtLeastO()) return;
         SpannableStringBuilder ssb = new SpannableStringBuilder("מכונה בתרגום");
         ssb.setSpan(LINK_SPAN, 1, 2, 0 /* flags */);
         initTextView(ssb);
@@ -171,7 +161,6 @@ public class LinkAccessibilityHelperTest {
 
     @Test
     public void testMultilineLink() {
-        if (isAtLeastO()) return;
         SpannableStringBuilder ssb = new SpannableStringBuilder(
                 "Lorem ipsum dolor sit amet, consectetur adipiscing elit. "
                 + "Praesent accumsan efficitur eros eu porttitor.");
@@ -193,7 +182,6 @@ public class LinkAccessibilityHelperTest {
 
     @Test
     public void testRtlMultilineLink() {
-        if (isAtLeastO()) return;
         String iwLoremIpsum = "אחר על רביעי אקטואליה. לוח דת אחרות המקובל רומנית, מיזמים מועמדים "
                 + "האנציקלופדיה בה צ'ט. מתן מה שנורו לערוך ייִדיש, בקר או החול אנתרופולוגיה, עוד "
                 + "דפים המחשב מיזמים ב.";
@@ -217,7 +205,6 @@ public class LinkAccessibilityHelperTest {
 
     @Test
     public void testBidiMultilineLink() {
-        if (isAtLeastO()) return;
         String iwLoremIpsum = "אחר על רביעי אקטואליה. לוח דת אחרות המקובל רומנית, מיזמים מועמדים "
                 + "האנציקלופדיה בה צ'ט. מתן מה שנורו לערוך ייִדיש, בקר או החול אנתרופולוגיה, עוד "
                 + "דפים המחשב מיזמים ב.";