1 /*
2  * Copyright (C) 2012 The Android Open Source Project
3  *
4  * Licensed under the Eclipse Public License, Version 1.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.eclipse.org/org/documents/epl-v10.php
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.android.ide.eclipse.adt.internal.wizards.templates;
17 
18 import static com.android.ide.eclipse.adt.internal.wizards.templates.NewProjectPage.ACTIVITY_NAME_SUFFIX;
19 
20 import com.android.ide.eclipse.adt.AdtUtils;
21 
22 import freemarker.template.SimpleScalar;
23 import freemarker.template.TemplateMethodModel;
24 import freemarker.template.TemplateModel;
25 import freemarker.template.TemplateModelException;
26 
27 import java.util.List;
28 
29 /**
30  * Similar to {@link FmCamelCaseToUnderscoreMethod}, but strips off common class
31  * suffixes such as "Activity", "Fragment", etc.
32  */
33 public class FmClassNameToResourceMethod implements TemplateMethodModel {
34     @Override
exec(List args)35     public TemplateModel exec(List args) throws TemplateModelException {
36         if (args.size() != 1) {
37             throw new TemplateModelException("Wrong arguments");
38         }
39 
40         String name = args.get(0).toString();
41 
42         if (name.isEmpty()) {
43             return new SimpleScalar("");
44         }
45 
46         name = stripSuffix(name, ACTIVITY_NAME_SUFFIX);
47         name = stripSuffix(name, "Fragment");              //$NON-NLS-1$
48         name = stripSuffix(name, "Service");               //$NON-NLS-1$
49         name = stripSuffix(name, "Provider");              //$NON-NLS-1$
50 
51         return new SimpleScalar(AdtUtils.camelCaseToUnderlines(name));
52     }
53 
54     // Strip off the end portion of the activity name. The user might be typing
55     // the activity name such that only a portion has been entered so far (e.g.
56     // "MainActivi") and we want to chop off that portion too such that we don't
stripSuffix(String name, String suffix)57     private static String stripSuffix(String name, String suffix) {
58         int suffixStart = name.lastIndexOf(suffix.charAt(0));
59         if (suffixStart != -1 && name.regionMatches(suffixStart, suffix, 0,
60                 name.length() - suffixStart)) {
61             name = name.substring(0, suffixStart);
62         }
63         assert !name.endsWith(suffix) : name;
64 
65         return name;
66     }
67 }