/*
* Pretty.java (Market View Java Applet)
* Copyright (C) 1996 Softbear Inc. (info@softbear.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/



/**
* Pretty printing versions of numbers, dates, and dollars.
* @see #QuoteView
*/

public class Pretty {

private static boolean eighthsFlag = false;

/*
* Convert a (presumably unsigned) number to a string,
* adding commas if necessary, e.g. 1234 becomes "1,234".
*/
public static java.lang.String commas(int n) {
int m = java.lang.Math.abs(n);
java.lang.String rawStr = new java.lang.Integer(n).toString();
java.lang.String revStr = "";
java.lang.String outStr = "";
int i, j = -1;
for (i = rawStr.length()-1; i >= 0; --i) {
if (++j != 0 && j % 3 == 0) {
revStr = revStr + ",";
}
revStr = revStr + rawStr.charAt(i);
}
for (i = revStr.length()-1; i >= 0; --i) {
outStr = outStr + revStr.charAt(i);
}
return outStr;
}


/*
* Format a date as "mm/dd/yy".
*/
public static String date(java.util.Date d) {
return (d.getMonth()+1) + "/" + d.getDate() + "/" + d.getYear();
}

/*
* Convert a signed (positive or negative) price to a string.
* Prices are reckoned in eighths.
*/
public static String dollars(int price) {
String dollarStr;
if (price == 0) {
dollarStr = Pretty.udollars(price);
} else if (price > 0) {
dollarStr = "+" + Pretty.udollars(price);
} else {
dollarStr = "-" + Pretty.udollars(-price);
}
return dollarStr;
}


/*
* Compute a heuristic metric for how pretty a graph would
* look using these parameters.
*/
public static int metric(int minEighths, int maxEighths, int rangeEighths) {
int halfRangeEighths = rangeEighths/2;
int topPct = 0;
int botPct = 0;
if (maxEighths > halfRangeEighths) {
topPct = (100*(maxEighths - halfRangeEighths))/halfRangeEighths;
}
if (minEighths < halfRangeEighths) {
botPct = (100*minEighths)/halfRangeEighths;
}
int metric = 101 + (topPct - botPct);
return metric;
}

/*
* Convert a (presumably unsigned) price to a string.
* Prices are reckoned in eighths, sign (if any) is ignored.
*/
public static String udollars(int price) {
int eighths = java.lang.Math.abs(price);
int dollars = eighths / 8;
int remainder = eighths % 8;
String dollarsStr = "$";
if (dollars != 0) {
dollarsStr = dollarsStr + Pretty.commas(dollars);
}
if (remainder != 0) {
if (dollarsStr.length() != 0) {
dollarsStr = dollarsStr + " ";
}
if (Pretty.eighthsFlag) {
dollarsStr = dollarsStr + new Integer(remainder).toString() + "/8";
} else {
String eighthsTab[] = {
"1/8", "1/4", "3/8", "1/2", "5/8", "3/4", "7/8"
};
dollarsStr = dollarsStr + eighthsTab[remainder-1];
}
} else if (price == 0) {
dollarsStr = dollarsStr + "0";
}
return dollarsStr;
}
}