content: /*
   * Copyright (C) 2015 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 com.amnesica.kryptey.inputmethod.latin.common;
  
  /**
   * Emojis are supplementary characters expressed as a low+high pair. For instance,
   * the emoji U+1F625 is encoded as "\uD83D\uDE25" in UTF-16, where '\uD83D' is in
   * the range of [0xd800, 0xdbff] and '\uDE25' is in the range of [0xdc00, 0xdfff].
   * {@see http://docs.oracle.com/javase/6/docs/api/java/lang/Character.html#unicode}
   */
  public final class UnicodeSurrogate {
    private static final char LOW_SURROGATE_MIN = '\uD800';
    private static final char LOW_SURROGATE_MAX = '\uDBFF';
    private static final char HIGH_SURROGATE_MIN = '\uDC00';
    private static final char HIGH_SURROGATE_MAX = '\uDFFF';
  
    public static boolean isLowSurrogate(final char c) {
      return c >= LOW_SURROGATE_MIN && c <= LOW_SURROGATE_MAX;
    }
  
    public static boolean isHighSurrogate(final char c) {
      return c >= HIGH_SURROGATE_MIN && c <= HIGH_SURROGATE_MAX;
    }
  }
  