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      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 import static com.android.ide.eclipse.adt.internal.wizards.templates.NewProjectPage.LAYOUT_NAME_PREFIX;
     20 
     21 import com.android.ide.eclipse.adt.AdtUtils;
     22 
     23 import freemarker.template.SimpleScalar;
     24 import freemarker.template.TemplateMethodModel;
     25 import freemarker.template.TemplateModel;
     26 import freemarker.template.TemplateModelException;
     27 
     28 import java.util.List;
     29 
     30 /**
     31  * Method invoked by FreeMarker to convert an Activity class name into
     32  * a suitable layout name.
     33  */
     34 public class FmActivityToLayoutMethod implements TemplateMethodModel {
     35     @Override
     36     public TemplateModel exec(List args) throws TemplateModelException {
     37         if (args.size() != 1) {
     38             throw new TemplateModelException("Wrong arguments");
     39         }
     40 
     41         String activityName = args.get(0).toString();
     42 
     43         if (activityName.isEmpty()) {
     44             return new SimpleScalar("");
     45         }
     46 
     47         // Strip off the end portion of the activity name. The user might be typing
     48         // the activity name such that only a portion has been entered so far (e.g.
     49         // "MainActivi") and we want to chop off that portion too such that we don't
     50         // offer a layout name partially containing the activity suffix (e.g. "main_activi").
     51         int suffixStart = activityName.lastIndexOf(ACTIVITY_NAME_SUFFIX.charAt(0));
     52         if (suffixStart != -1 && activityName.regionMatches(suffixStart, ACTIVITY_NAME_SUFFIX, 0,
     53                 activityName.length() - suffixStart)) {
     54             activityName = activityName.substring(0, suffixStart);
     55         }
     56         assert !activityName.endsWith(ACTIVITY_NAME_SUFFIX) : activityName;
     57 
     58         // Convert CamelCase convention used in activity class names to underlined convention
     59         // used in layout name:
     60         String name = LAYOUT_NAME_PREFIX + AdtUtils.camelCaseToUnderlines(activityName);
     61 
     62         return new SimpleScalar(name);
     63     }
     64 }