content: /*
   * Copyright (c) 2015 [1076559197@qq.com | tchen0707@gmail.com]
   *
   * 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 viewpager.lingdian.com.viewpagerdouble.view;
  
  import android.animation.ValueAnimator;
  
  import static java.lang.Math.min;
  
  /**
   * Created by castorflex on 8/14/14.
   */
  class CircularProgressBarUtils {
  
    private CircularProgressBarUtils() {
    }
  
    static void checkSpeed(float speed) {
      if (speed <= 0f)
        throw new IllegalArgumentException("Speed must be >= 0");
    }
  
    static void checkColors(int[] colors) {
      if (colors == null || colors.length == 0)
        throw new IllegalArgumentException("You must provide at least 1 color");
    }
  
    static void checkAngle(int angle) {
      if (angle < 0 || angle > 360)
        throw new IllegalArgumentException(String.format("Illegal angle %d: must be >=0 and <= 360", angle));
    }
  
    static void checkPositiveOrZero(float number, String name) {
      if (number < 0)
        throw new IllegalArgumentException(String.format("%s %d must be positive", name, number));
    }
  
    static void checkPositive(int number, String name) {
      if (number <= 0)
        throw new IllegalArgumentException(String.format("%s must not be null", name));
    }
  
    static void checkNotNull(Object o, String name) {
      if (o == null)
        throw new IllegalArgumentException(String.format("%s must be not null", name));
    }
  
    static float getAnimatedFraction(ValueAnimator animator) {
      float fraction = animator.getDuration() > 0 ? ((float) animator.getCurrentPlayTime()) / animator.getDuration() : 0f;
  
      fraction = min(fraction, 1f);
      fraction = animator.getInterpolator().getInterpolation(fraction);
      return fraction;
    }
  }
  