[automerger] RESTRICT AUTOMERGE Do not linkify text with RLO/LRO characters. am: 73f398d306 am: 363e47e676 am: efb165f557 am: b2b98a008b

Change-Id: I29c3f97af12987c8a1dd8a69529641d32d2dd172

core/java/android/text/util/Linkify.java

@@ -26,6 +26,7 @@ import android.text.style.URLSpan;
 import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.Spanned;
+import android.util.Log;
 import android.util.Patterns;
 import android.webkit.WebView;
 import android.widget.TextView;
@@ -65,6 +66,9 @@ import libcore.util.EmptyArray;
  */
 
 public class Linkify {
+
+    private static final String LOG_TAG = "Linkify";
+
     /**
      *  Bit field indicating that web URLs should be matched in methods that
      *  take an options mask
@@ -222,6 +226,11 @@ public class Linkify {
      *  @return True if at least one link is found and applied.
      */
     public static final boolean addLinks(@NonNull Spannable text, @LinkifyMask int mask) {
+        if (text != null && containsUnsupportedCharacters(text.toString())) {
+            android.util.EventLog.writeEvent(0x534e4554, "116321860", -1, "");
+            return false;
+        }
+
         if (mask == 0) {
             return false;
         }
@@ -267,6 +276,29 @@ public class Linkify {
         return true;
     }
 
+    /**
+     * Returns true if the specified text contains at least one unsupported character for applying
+     * links. Also logs the error.
+     *
+     * @param text the text to apply links to
+     * @hide
+     */
+    public static boolean containsUnsupportedCharacters(String text) {
+        if (text.contains("\u202C")) {
+            Log.e(LOG_TAG, "Unsupported character for applying links: u202C");
+            return true;
+        }
+        if (text.contains("\u202D")) {
+            Log.e(LOG_TAG, "Unsupported character for applying links: u202D");
+            return true;
+        }
+        if (text.contains("\u202E")) {
+            Log.e(LOG_TAG, "Unsupported character for applying links: u202E");
+            return true;
+        }
+        return false;
+    }
+
     /**
      *  Scans the text of the provided TextView and turns all occurrences of
      *  the link types indicated in the mask into clickable links.  If matches
@@ -414,6 +446,10 @@ public class Linkify {
     public static final boolean addLinks(@NonNull Spannable spannable, @NonNull Pattern pattern,
             @Nullable String scheme, @Nullable MatchFilter matchFilter,
             @Nullable TransformFilter transformFilter) {
+         if (spannable != null && containsUnsupportedCharacters(spannable.toString())) {
+            android.util.EventLog.writeEvent(0x534e4554, "116321860", -1, "");
+            return false;
+        }
         return addLinks(spannable, pattern, scheme, null, matchFilter,
                 transformFilter);
     }