content: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.text;
  
  import android.icu.lang.UCharacter;
  import android.icu.lang.UProperty;
  
  /**
   * An utility class for Emoji.
   * @hide
   */
  public class Emoji {
      public static int COMBINING_ENCLOSING_KEYCAP = 0x20E3;
  
      public static int ZERO_WIDTH_JOINER = 0x200D;
  
      public static int VARIATION_SELECTOR_16 = 0xFE0F;
  
      public static int CANCEL_TAG = 0xE007F;
  
      /**
       * Returns true if the given code point is regional indicator symbol.
       */
      public static boolean isRegionalIndicatorSymbol(int codePoint) {
          return 0x1F1E6 <= codePoint && codePoint <= 0x1F1FF;
      }
  
      /**
       * Returns true if the given code point is emoji modifier.
       */
      public static boolean isEmojiModifier(int codePoint) {
          return UCharacter.hasBinaryProperty(codePoint, UProperty.EMOJI_MODIFIER);
      }
  
      //
  
      /**
       * Returns true if the given code point is emoji modifier base.
       * @param c codepoint to check
       * @return true if is emoji modifier base
       */
      public static boolean isEmojiModifierBase(int c) {
          // These two characters were removed from Emoji_Modifier_Base in Emoji 4.0, but we need to
          // keep them as emoji modifier bases since there are fonts and user-generated text out there
          // that treats these as potential emoji bases.
          if (c == 0x1F91D || c == 0x1F93C) {
              return true;
          }
          // Emoji Modifier Base characters new in Unicode emoji 11
          // From https://www.unicode.org/Public/emoji/11.0/emoji-data.txt
          // TODO: Remove once emoji-data.text 11 is in ICU or update to 11.
          if ((0x1F9B5 <= c && c <= 0x1F9B6) || (0x1F9B8 <= c && c <= 0x1F9B9)) {
              return true;
          }
          return UCharacter.hasBinaryProperty(c, UProperty.EMOJI_MODIFIER_BASE);
      }
  
      /**
       * Returns true if the character is a new emoji still not supported in our version of ICU.
       */
      public static boolean isNewEmoji(int c) {
          // Emoji characters new in Unicode emoji 12
          // From https://www.unicode.org/Public/emoji/12.0/emoji-data.txt
          // TODO: Remove once emoji-data.text 12 is in ICU or update to 12.
          if (c < 0x1F6D5 || c > 0x1FA95) {
              // Optimization for characters outside the new emoji range.
              return false;
          }
          return c == 0x1F6D5 || c == 0x1F6FA || c == 0x1F93F || c == 0x1F971 || c == 0x1F97B
                  || (0x1F7E0 <= c && c <= 0x1F7EB) || (0x1F90D <= c && c <= 0x1F90F)
                  || (0x1F9A5 <= c && c <= 0x1F9AA) || (0x1F9AE <= c && c <= 0x1F9AF)
                  || (0x1F9BA <= c && c <= 0x1F9BF) || (0x1F9C3 <= c && c <= 0x1F9CA)
                  || (0x1F9CD <= c && c <= 0x1F9CF) || (0x1FA70 <= c && c <= 0x1FA73)
                  || (0x1FA78 <= c && c <= 0x1FA7A) || (0x1FA80 <= c && c <= 0x1FA82)
                  || (0x1FA90 <= c && c <= 0x1FA95);
      }
  
      /**
       * Returns true if the character has Emoji property.
       */
      public static boolean isEmoji(int codePoint) {
          return isNewEmoji(codePoint) || UCharacter.hasBinaryProperty(codePoint, UProperty.EMOJI);
      }
  
      // Returns true if the character can be a base character of COMBINING ENCLOSING KEYCAP.
      public static boolean isKeycapBase(int codePoint) {
          return ('0' <= codePoint && codePoint <= '9') || codePoint == '#' || codePoint == '*';
      }
  
      /**
       * Returns true if the character can be a part of tag_spec in emoji tag sequence.
       *
       * Note that 0xE007F (CANCEL TAG) is not included.
       */
      public static boolean isTagSpecChar(int codePoint) {
          return 0xE0020 <= codePoint && codePoint <= 0xE007E;
      }
  }
  