2 * Sone - JavascriptFilter.java - Copyright © 2011–2016 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.template.Filter;
23 import net.pterodactylus.util.template.TemplateContext;
25 import com.google.common.io.BaseEncoding;
28 * Escapes double quotes, backslashes, carriage returns and line feeds, and
29 * additionally encloses a given string with double quotes to make it possible
30 * to use a string in Javascript.
32 public class JavascriptFilter implements Filter {
38 public Object format(TemplateContext templateContext, Object data, Map<String, Object> parameters) {
39 StringBuilder javascriptString = new StringBuilder();
40 javascriptString.append('"');
41 for (char c : String.valueOf(data).toCharArray()) {
43 javascriptString.append("\\r");
47 javascriptString.append("\\n");
51 javascriptString.append("\\t");
54 if ((c == '"') || (c == '\\')) {
55 javascriptString.append('\\');
56 javascriptString.append(c);
58 javascriptString.append("\\x").append(BaseEncoding.base16().lowerCase().encode(new byte[] { (byte) c }));
60 javascriptString.append(c);
63 javascriptString.append('"');
64 return javascriptString.toString();