content: /*
   * Copyright 2022 Google LLC
   *
   * 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.google.material.color.dislike;
  
  import com.google.material.color.hct.Hct;
  
  /**
   * Check and/or fix universally disliked colors.
   *
   * <p>Color science studies of color preference indicate universal distaste for dark yellow-greens,
   * and also show this is correlated to distate for biological waste and rotting food.
   *
   * <p>See Palmer and Schloss, 2010 or Schloss and Palmer's Chapter 21 in Handbook of Color
   * Psychology (2015).
   */
  public final class DislikeAnalyzer {
  
      private DislikeAnalyzer() {
          throw new UnsupportedOperationException();
      }
  
      /**
       * Returns true if color is disliked.
       *
       * <p>Disliked is defined as a dark yellow-green that is not neutral.
       */
      public static boolean isDisliked(Hct hct) {
          final boolean huePasses = Math.round(hct.getHue()) >= 90.0 && Math.round(hct.getHue()) <= 111.0;
          final boolean chromaPasses = Math.round(hct.getChroma()) > 16.0;
          final boolean tonePasses = Math.round(hct.getTone()) < 65.0;
  
          return huePasses && chromaPasses && tonePasses;
      }
  
      /**
       * If color is disliked, lighten it to make it likable.
       */
      public static Hct fixIfDisliked(Hct hct) {
          if (isDisliked(hct)) {
              return Hct.from(hct.getHue(), hct.getChroma(), 70.0);
          }
  
          return hct;
    }
  }
  