/**
* If the line is short, this adds the line to StringArray. If the line is long, this splits the
* line in 2 and adds both to StringArray.
*
* @param limit is the maximum number of characters per line
* @param stringArray to capture the parts of s
* @param s the string to be split (if needed) (if s == null or "", stringArray is unchanged).
*/
private static void splitLine(int limit, StringArray stringArray, String s) {
int limit10 = limit * 10;
while (true) {
if (s == null || s.length() == 0) return;
int sLength = s.length();
if (sLength <= limit * 2 / 3) { // short line is okay even if all caps
stringArray.add(s);
return;
}
// count through chars noting more width of cap letters and digits, than avg letter
int lastSpace = -1;
int lastNonDigitChar = -1;
int po = 0;
int sum10 = 0;
while (po < sLength && sum10 < limit10) {
char ch = s.charAt(po);
if (String2.isDigit(ch)) {
sum10 += 14;
} else if (String2.isLetter(ch)) {
sum10 +=
ch == 'C' || ch == 'M' || ch == 'S' || ch == 'W'
? 16
: ch == 'c'
|| ch == 'm'
|| ch == 's'
|| ch == 'w'
|| ch == Character.toUpperCase(ch)
? 15
: 10;
} else if (ch == ' ') {
sum10 += 8;
lastSpace = po;
lastNonDigitChar = po;
} else if ("<>=_".indexOf(ch) >= 0) {
sum10 += 17;
} else {
sum10 += 10;
lastNonDigitChar = po;
}
po++;
}
// po == sLength is success
// if just a few chars more, let it go
if (po + 4 >= sLength) {
stringArray.add(s);
return;
}
// break at last space (or nonDigitLetter) before limit
po =
lastSpace >= limit * 3 / 4
? lastSpace
: // preferred
lastNonDigitChar >= limit / 2
? lastNonDigitChar
: // next best
po; // worst case
// add the string
stringArray.add(s.substring(0, po + 1));
// revamp s
s = s.substring(po + 1).trim(); // remove leading space, if any
}
}
