package org.docx4j.utils;
public class FoNumberFormatUtil {
// constants
public static final String FO_PAGENUMBER_DECIMAL = "1"; // '1'
public static final String FO_PAGENUMBER_LOWERALPHA = "a"; // 'a'
public static final String FO_PAGENUMBER_UPPERALPHA = "A"; // 'A'
public static final String FO_PAGENUMBER_LOWERROMAN = "i"; // 'i'
public static final String FO_PAGENUMBER_UPPERROMAN = "I"; // 'I'
/** Format a page number the way fo would do it, taken from PageNumberGenerator
* of Apache-Fop 1.0
*
* @param pageNumber to be formatted
* @param foFormat fo format name
* @return formatted page number (or null if pageNumber < 0)
*/
public static String format(int pageNumber, String foFormat) {
String ret = null;
if (pageNumber > -1) {
if (foFormat == null) foFormat = "1"; //default
if (pageNumber == 1) {
//shortcut for html, for 1 the foFormat and the result are the same
ret = foFormat;
}
else {
if (FO_PAGENUMBER_DECIMAL.equals(foFormat)) {
//formatting with leading zeroes omitted
ret = Integer.toString(pageNumber);
} else if (FO_PAGENUMBER_LOWERROMAN.equals(foFormat) ||
FO_PAGENUMBER_UPPERROMAN.equals(foFormat)) {
ret = makeRoman(pageNumber);
if (FO_PAGENUMBER_UPPERROMAN.equals(foFormat)) {
ret = ret.toUpperCase();
}
} else {
// alphabetic
ret = makeAlpha(pageNumber);
if (FO_PAGENUMBER_UPPERALPHA.equals(foFormat)) {
ret = ret.toUpperCase();
}
}
}
}
return ret;
}
private static String makeRoman(int num) {
int[] arabic = {
1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1
};
String[] roman = {
"m", "cm", "d", "cd", "c", "xc", "l", "xl", "x", "ix", "v", "iv",
"i"
};
int i = 0;
StringBuffer romanNumber = new StringBuffer();
while (num > 0) {
while (num >= arabic[i]) {
num = num - arabic[i];
romanNumber.append(roman[i]);
}
i = i + 1;
}
return romanNumber.toString();
}
private static String makeAlpha(int num) {
String letters = "abcdefghijklmnopqrstuvwxyz";
StringBuffer alphaNumber = new StringBuffer();
int base = 26;
int rem = 0;
num--;
if (num < base) {
alphaNumber.append(letters.charAt(num));
} else {
while (num >= base) {
rem = num % base;
alphaNumber.append(letters.charAt(rem));
num = num / base;
}
alphaNumber.append(letters.charAt(num - 1));
}
return alphaNumber.reverse().toString();
}
}