application.ui.tools.CodePointHelper Maven / Gradle / Ivy
package application.ui.tools;
class CodePointHelper {
enum Style {
XML,
COMMA,
LINE
}
enum Mode {
HEX,
DECIMAL
}
enum Input {
NAME, CODE
}
/**
* Formats a number as a zero padded hex string of a specified length.
* @param i the number to format
* @param len the length of the resulting string
* @return returns a string of the specified length
*/
static String toHexString(int i, int len) {
return padStr(Integer.toHexString(i), len, '0');
}
/**
* Parses a string as a sequence of code point entities and returns the
* corresponding characters. For example:
* "0065,0066,0067" will be return "ABC".
* @param str the string to parse
* @param m the parser mode
* @return returns a string
* @throws IllegalArgumentException if the string could not be parsed
*/
static String parse(String str, Mode m) {
if (str==null || str.equals("")) {
return "";
}
String[]strs;
Style st = (str.contains("&")?Style.XML:(str.contains("|")?Style.LINE:Style.COMMA));
switch (st) {
case XML:
strs = str.split(";");
break;
case LINE:
strs = str.split("[\\r\\n]+");
break;
case COMMA: default:
strs = str.split(",");
break;
}
StringBuffer ret = new StringBuffer();
for (String s : strs) {
s = s.trim();
switch (st) {
case XML:
switch (m) {
case DECIMAL:
if (s.startsWith("&#")) {
s = s.substring(2);
} else {
throw new IllegalArgumentException("Cannot parse string");
}
break;
case HEX: default:
if (s.startsWith("&#x")) {
s = s.substring(3);
} else {
throw new IllegalArgumentException("Cannot parse string");
}
break;
}
break;
case LINE:
int x = s.indexOf('|');
if (x>-1) {
s = s.substring(0, x).trim();
}
break;
case COMMA: default:
break;
}
switch (m) {
case DECIMAL:
ret.append((char)Integer.parseInt(s, 10));
break;
case HEX: default:
ret.append((char)Integer.parseInt(s, 16));
break;
}
}
return ret.toString();
}
/**
* Formats a string as code point entities.
* @param str the string to format
* @param s the formatting style
* @param m the formatting mode
* @return returns a string containing a sequence of code point entities
*/
static String format(String str, Style s, Mode m) {
StringBuffer sb = new StringBuffer();
for (int i=0; i