1 package org.apache.velocity.app.event.implement;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.apache.velocity.app.event.IncludeEventHandler;
23
24 /**
25 * <p>Event handler that looks for included files relative to the path of the
26 * current template. The handler assumes that paths are separated by a forward
27 * slash "/" or backwards slash "\".
28 *
29 * @author <a href="mailto:wglass@forio.com">Will Glass-Husain </a>
30 * @version $Id: IncludeRelativePath.java 685685 2008-08-13 21:43:27Z nbubna $
31 * @since 1.5
32 */
33 public class IncludeRelativePath implements IncludeEventHandler {
34
35 /**
36 * Return path relative to the current template's path.
37 *
38 * @param includeResourcePath the path as given in the include directive.
39 * @param currentResourcePath the path of the currently rendering template that includes the
40 * include directive.
41 * @param directiveName name of the directive used to include the resource. (With the
42 * standard directives this is either "parse" or "include").
43
44 * @return new path relative to the current template's path
45 */
46 public String includeEvent(
47 String includeResourcePath,
48 String currentResourcePath,
49 String directiveName)
50 {
51 // if the resource name starts with a slash, it's not a relative path
52 if (includeResourcePath.startsWith("/") || includeResourcePath.startsWith("\\") ) {
53 return includeResourcePath;
54 }
55
56 int lastslashpos = Math.max(
57 currentResourcePath.lastIndexOf("/"),
58 currentResourcePath.lastIndexOf("\\")
59 );
60
61 // root of resource tree
62 if (lastslashpos == -1) {
63 return includeResourcePath;
64 }
65
66 // prepend path to the include path
67 return currentResourcePath.substring(0,lastslashpos) + "/" + includeResourcePath;
68 }
69 }