| 15 | } |
| 16 | |
| 17 | private static String escapeId(String str) { |
| 18 | StringBuilder ret = null; |
| 19 | int retEnd = 0; |
| 20 | |
| 21 | for (int i = 0, max = str.length(); i < max; i++) { |
| 22 | char c = str.charAt(i); |
| 23 | |
| 24 | if ((c < 'A' || c > 'Z') && (c < 'a' || c > 'z') && (c < '0' || c > '9') && c != '-' && c != '_' && c != '.') { // use : as an escape identifier |
| 25 | if (ret == null) ret = new StringBuilder(max * 2); |
| 26 | |
| 27 | ret.append(str, retEnd, i); |
| 28 | |
| 29 | ret.append(':'); |
| 30 | |
| 31 | for (int j = 0; j < 4; j++) { |
| 32 | int v = (c >>> ((3 - j) * 4)) & 0xf; |
| 33 | ret.append("0123456789abcdef".charAt(v)); |
| 34 | } |
| 35 | |
| 36 | retEnd = i + 1; |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | if (ret == null) { |
| 41 | return str; |
| 42 | } else { |
| 43 | ret.append(str, retEnd, str.length()); |
| 44 | |
| 45 | return ret.toString(); |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | public static String escape(String str, String... allowedTags) { |
| 50 | Pattern tagPattern = compileTagPattern(allowedTags); |