2 * Sone - JavascriptFilter.java - Copyright © 2011 David Roden
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 package net.pterodactylus.sone.template;
22 import net.pterodactylus.util.number.Hex;
23 import net.pterodactylus.util.template.Filter;
24 import net.pterodactylus.util.template.TemplateContext;
27 * Escapes double quotes, backslashes, carriage returns and line feeds, and
28 * additionally encloses a given string with double quotes to make it possible
29 * to use a string in Javascript.
31 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
33 public class JavascriptFilter implements Filter {
39 public Object format(TemplateContext templateContext, Object data, Map<String, String> parameters) {
40 StringBuilder javascriptString = new StringBuilder();
41 javascriptString.append('"');
42 for (char c : String.valueOf(data).toCharArray()) {
44 javascriptString.append("\\r");
48 javascriptString.append("\\n");
52 javascriptString.append("\\t");
55 if ((c == '"') || (c == '\\')) {
56 javascriptString.append('\\');
57 javascriptString.append(c);
59 javascriptString.append("\\x").append(Hex.toHex((byte) c));
61 javascriptString.append(c);
64 javascriptString.append('"');
65 return javascriptString.toString();