content: /*
   * Copyright (c) 1997 - 2022
   * Idorsia Pharmaceuticals Ltd.
   * Hegenheimermattweg 91
   * CH-4123 Allschwil, Switzerland
   *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   * 3. Neither the name of the copyright holder nor the
   *    names of its contributors may be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * @author Thomas Sander
   */
  
  package com.actelion.research.util;
  
  import java.util.ArrayList;
  
  public class ScaleLabelCreator {
  
  	/**
  	 * Creates a list of scale labels with their relative positions for a linear
  	 * numerical scale with given numerical value range.
  	 * @param rangeLow low limit of numerical range
  	 * @param rangeHigh high limit of numerical range
  	 * @return list of labels with relative positions
  	 */
  	public static ArrayList<ScaleLabel> createLinearLabelList(double rangeLow, double rangeHigh) {
  		if (rangeHigh <= rangeLow)
  			return null;
  
  		double range = rangeHigh - rangeLow;
  
  		int exponent = 0;
  		while (range >= 50.0) {
  			rangeLow /= 10;
  			range /= 10;
  			exponent++;
  			}
  		while (range < 5.0) {
  			rangeLow *= 10;
  			range *= 10.0;
  			exponent--;
  			}
  
  		int gridSpacing = (int)(range / 10);
  	    if (gridSpacing < 1)
  			gridSpacing = 1;
  		else if (gridSpacing < 2)
  			gridSpacing = 2;
  		else
  			gridSpacing = 5;
  
  	    int value = (rangeLow < 0) ?
  		      (int)(rangeLow - 0.0000001 - (rangeLow % gridSpacing))
  			: (int)(rangeLow + 0.0000001 + gridSpacing - (rangeLow % gridSpacing));
  
  		ArrayList<ScaleLabel> labelList = new ArrayList<ScaleLabel>();
  		while (value < (rangeLow + range)) {
  			double position = (value-rangeLow) / range;
  
  			labelList.add(new ScaleLabel(DoubleFormat.toShortString(value, exponent), position, value*Math.pow(10, exponent)));
  
  			value += gridSpacing;
  			}
  
  		return labelList;
  		}
  
  	/**
  	 * Creates a list of scale labels with their relative positions for a
  	 * logarithmical numerical scale with given numerical value range.
  	 * @param rangeLow log10 of low limit of numerical range
  	 * @param rangeHigh log10 of high limit of numerical range
  	 * @return list of labels with relative positions
  	 */
  	public static ArrayList<ScaleLabel> createLogarithmicLabelList(double rangeLow, double rangeHigh) {
  		if (rangeHigh <= rangeLow)
  			return null;
  
  		double range = rangeHigh - rangeLow;
  
          int intMin = (int)Math.floor(rangeLow);
          int intMax = (int)Math.floor(rangeHigh);
          
  		ArrayList<ScaleLabel> labelList = new ArrayList<ScaleLabel>();
          if (range > 5.4) {
              int step = 1 + (int)range/10;
              for (int i=intMin; i<=intMax; i+=step)
                  addLogarithmicScaleLabel(labelList, i, rangeLow, range);
              }
          else if (range > 3.6) {
              for (int i=intMin; i<=intMax; i++) {
                  addLogarithmicScaleLabel(labelList, i, rangeLow, range);
                  addLogarithmicScaleLabel(labelList, i + 0.47712125472f, rangeLow, range);
                  }
              }
          else if (range > 1.8) {
              for (int i=intMin; i<=intMax; i++) {
                  addLogarithmicScaleLabel(labelList, i, rangeLow, range);
                  addLogarithmicScaleLabel(labelList, i + 0.301029996f, rangeLow, range);
                  addLogarithmicScaleLabel(labelList, i + 0.698970004f, rangeLow, range);
                  }
              }
          else if (range > 1.0) {
              for (int i=intMin; i<=intMax; i++) {
                  addLogarithmicScaleLabel(labelList, i, rangeLow, range);
                  addLogarithmicScaleLabel(labelList, i + 0.176091259f, rangeLow, range);
                  addLogarithmicScaleLabel(labelList, i + 0.301029996f, rangeLow, range);
                  addLogarithmicScaleLabel(labelList, i + 0.477121255f, rangeLow, range);
                  addLogarithmicScaleLabel(labelList, i + 0.698970004f, rangeLow, range);
                  addLogarithmicScaleLabel(labelList, i + 0.84509804f, rangeLow, range);
                  }
              }
  		else if (range > 0.6) {
  			for (int i=intMin; i<=intMax; i++) {
  				addLogarithmicScaleLabel(labelList, i, rangeLow, range);						// 1.0
  				addLogarithmicScaleLabel(labelList, i + 0.113943352f, rangeLow, range);	// 1.3
  				addLogarithmicScaleLabel(labelList, i + 0.204119983f, rangeLow, range);	// 1.6
  				addLogarithmicScaleLabel(labelList, i + 0.301029996f, rangeLow, range);	// 2.0
  				addLogarithmicScaleLabel(labelList, i + 0.397940009f, rangeLow, range);	// 2.5
  				addLogarithmicScaleLabel(labelList, i + 0.505149978f, rangeLow, range);	// 3.2
  				addLogarithmicScaleLabel(labelList, i + 0.602059991f, rangeLow, range);	// 4.0
  				addLogarithmicScaleLabel(labelList, i + 0.698970004f, rangeLow, range);	// 5.0
  				addLogarithmicScaleLabel(labelList, i + 0.806179974f, rangeLow, range);	// 6.4
  				addLogarithmicScaleLabel(labelList, i + 0.903089987f, rangeLow, range);	// 8.0
  				}
  			}
          else {
  			double start = Math.pow(10, rangeLow);
  			double length = Math.pow(10, rangeLow+range) - start;
  
              int exponent = 0;
              while (length >= 50.0) {
                  start /= 10;
                  length /= 10;
                  exponent++;
                  }
              while (length < 5.0) {
                  start *= 10;
                  length *= 10.0;
                  exponent--;
                  }
  
              int gridSpacing = (int)(length / 10);
              if (gridSpacing < 1)
                  gridSpacing = 1;
              else if (gridSpacing < 2)
                  gridSpacing = 2;
              else
                  gridSpacing = 5;
  
              int value = (start < 0) ?
                    (int)(start - 0.0000001 - (start % gridSpacing))
                  : (int)(start + 0.0000001 + gridSpacing - (start % gridSpacing));
              while (value < (start + length)) {
  				double log = Math.log10(value) + exponent;
  				double position = (log-rangeLow) / range;
                  labelList.add(new ScaleLabel(DoubleFormat.toShortString(value, exponent), position, log));
                  value += gridSpacing;
                  }
              }
  
          return labelList;
  		}
  
      private static void addLogarithmicScaleLabel(ArrayList<ScaleLabel> labelList, double value, double rangeLow, double range) {
          if (value >= rangeLow && value <= rangeLow+range) {
  			double position = (value-rangeLow) / range;
              labelList.add(new ScaleLabel(DoubleFormat.toString(Math.pow(10, value), 3, true), position, value));
              }
          }
  	}
  