Update frameworks/base Emoji.java to Unicode 13.

As ICU is updated, delete special cases.

Test: atest core/tests/coretests/src/android/text/EmojiTest.java
Bug: 151964652

Change-Id: I89032c22e5464d257866d926062db34c65943572
(cherry picked from commit 31d7c155b7f58525f13c5fd1f0eae450e97c1080)

1 files changed, 2 insertions, 32 deletions

diff --git a/core/java/android/text/AndroidBidi.java b/core/java/android/text/AndroidBidi.java
index f1e2181a8538..b9811638b28f 100644
--- a/core/java/android/text/AndroidBidi.java
+++ b/core/java/android/text/AndroidBidi.java
@@ -17,11 +17,7 @@
 package android.text;
 
 import android.compat.annotation.UnsupportedAppUsage;
-import android.icu.lang.UCharacter;
-import android.icu.lang.UCharacterDirection;
-import android.icu.lang.UProperty;
 import android.icu.text.Bidi;
-import android.icu.text.BidiClassifier;
 import android.text.Layout.Directions;
 
 import com.android.internal.annotations.VisibleForTesting;
@@ -34,32 +30,6 @@ import com.android.internal.annotations.VisibleForTesting;
 public class AndroidBidi {
 
     /**
-     * Overrides ICU {@link BidiClassifier} in order to correctly handle character directions for
-     * newest emoji that ICU is not aware of.
-     */
-    public static class EmojiBidiOverride extends BidiClassifier {
-        public EmojiBidiOverride() {
-            super(null /* No persisting object needed */);
-        }
-
-        // Tells ICU to use the standard Unicode value.
-        private static final int NO_OVERRIDE =
-                UCharacter.getIntPropertyMaxValue(UProperty.BIDI_CLASS) + 1;
-
-        @Override
-        public int classify(int c) {
-            if (Emoji.isNewEmoji(c)) {
-                // All new emoji characters in Unicode 10.0 are of the bidi class ON.
-                return UCharacterDirection.OTHER_NEUTRAL;
-            } else {
-                return NO_OVERRIDE;
-            }
-        }
-    }
-
-    private static final EmojiBidiOverride sEmojiBidiOverride = new EmojiBidiOverride();
-
-    /**
      * Runs the bidi algorithm on input text.
      */
     @UnsupportedAppUsage
@@ -82,7 +52,6 @@ public class AndroidBidi {
             default: paraLevel = Bidi.LTR; break;
         }
         final Bidi icuBidi = new Bidi(length /* maxLength */, 0 /* maxRunCount */);
-        icuBidi.setCustomClassifier(sEmojiBidiOverride);
         icuBidi.setPara(chs, paraLevel, null /* embeddingLevels */);
         for (int i = 0; i < length; i++) {
             chInfo[i] = icuBidi.getLevelAt(i);
@@ -220,4 +189,5 @@ public class AndroidBidi {
         }
         return new Directions(ld);
     }
-}
\ No newline at end of file
+}
+