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 com.android.internal.widget;
  
  import android.annotation.UnsupportedAppUsage;
  
  public class ScrollBarUtils {
  
      @UnsupportedAppUsage
      public static int getThumbLength(int size, int thickness, int extent, int range) {
          // Avoid the tiny thumb.
          final int minLength = thickness * 2;
          int length = Math.round((float) size * extent / range);
          if (length < minLength) {
              length = minLength;
          }
          return length;
      }
  
      public static int getThumbOffset(int size, int thumbLength, int extent, int range, int offset) {
          // Avoid the too-big thumb.
          int thumbOffset = Math.round((float) (size - thumbLength) * offset / (range - extent));
          if (thumbOffset > size - thumbLength) {
              thumbOffset = size - thumbLength;
          }
          return thumbOffset;
      }
  }
  