net.sourceforge.plantuml.utils.CharHidder Maven / Gradle / Ivy
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package net.sourceforge.plantuml.utils;
public class CharHidder {
// ::remove file when __HAXE__
public static String addTileAtBegin(String s) {
return "~" + s;
}
public static String hide(String s) {
// System.err.println("hide " + s);
final StringBuilder result = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
final char c = s.charAt(i);
if (c == '\\' && i + 1 < s.length() && s.charAt(i + 1) == '~') {
result.append(hideChar('~'));
i++;
} else if (c == '~' && i + 1 < s.length()) {
i++;
final char c2 = s.charAt(i);
if (isToBeHidden(c2)) {
result.append(hideChar(c2));
} else {
result.append(c);
result.append(c2);
}
} else {
result.append(c);
}
}
// System.err.println("---> " + result);
return result.toString();
}
private static boolean isToBeHidden(final char c) {
if (c == '_' || c == '-' || c == '\"' || c == '#' || c == ']' || c == '[' || c == '*' || c == '.' || c == '/'
|| c == '<') {
return true;
}
return false;
}
private static char hideChar(char c) {
if (c > 255) {
throw new IllegalArgumentException();
}
return (char) ('\uE000' + c);
}
private static char unhideChar(char c) {
if (c >= '\uE000' && c <= '\uE0FF') {
return (char) (c - '\uE000');
}
return c;
}
public static String unhide(String s) {
final StringBuilder result = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
final char c = s.charAt(i);
result.append(unhideChar(c));
}
// System.err.println("unhide " + result);
return result.toString();
}
}