+++ /dev/null
-/* $RCSfile$
- * $Author: hansonr $
- * $Date: 2007-04-26 16:57:51 -0500 (Thu, 26 Apr 2007) $
- * $Revision: 7502 $
- *
- * Some portions of this file have been modified by Robert Hanson hansonr.at.stolaf.edu 2012-2017
- * for use in SwingJS via transpilation into JavaScript using Java2Script.
- *
- * Copyright (C) 2005 The Jmol Development Team
- *
- * Contact: jmol-developers@lists.sf.net
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-package javajs.util;
-
-/**
- * created to remove ambiguities and make a simpler DecimalFormat
- */
-public class DF {
-
- private final static String[] formattingStrings = { "0", "0.0", "0.00",
- "0.000", "0.0000", "0.00000", "0.000000", "0.0000000", "0.00000000",
- "0.000000000" };
- private final static String zeros = "0000000000000000000000000000000000000000";
-
- private final static float[] formatAdds = { 0.5f, 0.05f, 0.005f, 0.0005f,
- 0.00005f, 0.000005f, 0.0000005f, 0.00000005f, 0.000000005f, 0.0000000005f };
-
- private final static Boolean[] useNumberLocalization = new Boolean[] { Boolean.TRUE };
-
- public static void setUseNumberLocalization(boolean TF) {
- useNumberLocalization[0] = (TF ? Boolean.TRUE : Boolean.FALSE);
- }
-
- public static String formatDecimalDbl(double value, int decimalDigits) {
- if (decimalDigits == Integer.MAX_VALUE
- || value == Double.NEGATIVE_INFINITY
- || value == Double.POSITIVE_INFINITY
- || Double.isNaN(value))
- return "" + value;
- return DF.formatDecimal((float) value, decimalDigits);
- }
-
- /**
- * a simple alternative to DecimalFormat (which Java2Script does not have
- * and which is quite too complex for our use here.)
- *
- * @param value
- * @param decimalDigits
- * @return formatted decimal
- */
- public static String formatDecimal(float value, int decimalDigits) {
- if (decimalDigits == Integer.MAX_VALUE
- || value == Float.NEGATIVE_INFINITY || value == Float.POSITIVE_INFINITY || Float.isNaN(value))
- return "" + value;
- int n;
- if (decimalDigits < 0) {
- decimalDigits = -decimalDigits;
- if (decimalDigits > formattingStrings.length)
- decimalDigits = formattingStrings.length;
- if (value == 0)
- return formattingStrings[decimalDigits - 1] + "E+0";
- //scientific notation
- n = 0;
- double d;
- if (Math.abs(value) < 1) {
- n = 10;
- d = value * 1e-10;
- } else {
- n = -10;
- d = value * 1e10;
- }
- String s = ("" + d).toUpperCase();
- int i = s.indexOf("E");
- n = PT.parseInt(s.substring(i + 1)) + n;
- String sf;
- if (i < 0) {
- sf = "" + value;
- } else {
- float f = PT.parseFloat(s.substring(0, i));
- if (f == 10 || f == -10) {
- //d = 9.99999997465; n = -6 --> 10.00000E-5
- f /= 10;
- n += (n < 0 ? 1 : -1);
- }
- sf = formatDecimal(f, decimalDigits - 1);
- }
- return sf + "E" + (n >= 0 ? "+" : "") + n;
- }
-
- if (decimalDigits >= formattingStrings.length)
- decimalDigits = formattingStrings.length - 1;
- String s1 = ("" + value).toUpperCase();
- int pt = s1.indexOf(".");
- if (pt < 0) // specifically JavaScript "-2" not "-2.0"
- return s1 + formattingStrings[decimalDigits].substring(1);
- boolean isNeg = s1.startsWith("-");
- if (isNeg) {
- s1 = s1.substring(1);
- pt--;
- }
- int pt1 = s1.indexOf("E-");
- if (pt1 > 0) {
- n = PT.parseInt(s1.substring(pt1 + 1));
- // 3.567E-2
- // 0.03567
- s1 = "0." + zeros.substring(0, -n - 1) + s1.substring(0, 1) + s1.substring(2, pt1);
- pt = 1;
- }
-
- pt1 = s1.indexOf("E");
- // 3.5678E+3
- // 3567.800000000
- // 1.234E10 %3.8f -> 12340000000.00000000
- if (pt1 > 0) {
- n = PT.parseInt(s1.substring(pt1 + 1));
- s1 = s1.substring(0, 1) + s1.substring(2, pt1) + zeros;
- s1 = s1.substring(0, n + 1) + "." + s1.substring(n + 1);
- pt = s1.indexOf(".");
- }
- // "234.345667 len == 10; pt = 3
- // " 0.0 " decimalDigits = 1
-
- int len = s1.length();
- int pt2 = decimalDigits + pt + 1;
- if (pt2 < len && s1.charAt(pt2) >= '5') {
- return formatDecimal(
- value + (isNeg ? -1 : 1) * formatAdds[decimalDigits], decimalDigits);
- }
-
- SB sb = SB.newS(s1.substring(0, (decimalDigits == 0 ? pt
- : ++pt)));
- for (int i = 0; i < decimalDigits; i++, pt++) {
- if (pt < len)
- sb.appendC(s1.charAt(pt));
- else
- sb.appendC('0');
- }
- s1 = (isNeg ? "-" : "") + sb;
- return (Boolean.TRUE.equals(useNumberLocalization[0]) ? s1 : s1.replace(',',
- '.'));
- }
-
- /**
- * an alternative to DecimalFormat "0.#"
- *
- * @param x
- * @param precision
- * @return formatted number
- */
- public static String formatDecimalTrimmed(double x, int precision) {
- String str = formatDecimalDbl(x, precision);
- int m = str.length() - 1;
- char zero = '0';
- while (m >= 0 && str.charAt(m) == zero)
- m--;
- return str.substring(0, m + 1); // 0.##...
- }
-
-}
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