1   /**
2    * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.tools;
24  
25  import com.liferay.portal.kernel.util.StringPool;
26  import com.liferay.portal.kernel.util.StringUtil;
27  import com.liferay.portal.util.FileImpl;
28  
29  import java.io.File;
30  
31  /**
32   * <a href="CSSBuilder.java.html"><b><i>View Source</i></b></a>
33   *
34   * @author Brian Wing Shun Chan
35   *
36   */
37  public class CSSBuilder {
38  
39      public static void main(String[] args) {
40          if (args.length == 2) {
41              new CSSBuilder(args[0], args[1]);
42          }
43          else {
44              throw new IllegalArgumentException();
45          }
46      }
47  
48      public CSSBuilder(String cssDir, String mergedFile) {
49          try {
50              File mainCssFile = new File(cssDir + "/main.css");
51  
52              if (!mainCssFile.exists()) {
53                  System.out.println(
54                      "Do not pack " + cssDir +
55                          "/main.css because it does not exist.");
56  
57                  return;
58              }
59  
60              String content = _fileUtil.read(mainCssFile);
61  
62              content = replaceImports(cssDir, content, 0);
63  
64              _fileUtil.write(mergedFile, content);
65          }
66          catch (Exception e) {
67              e.printStackTrace();
68          }
69      }
70  
71      public String replaceImports(String cssDir, String s, int level)
72          throws Exception {
73  
74          StringBuilder sb = new StringBuilder(s.length());
75  
76          int pos = 0;
77  
78          while (true) {
79              int x = s.indexOf(_BEGIN, pos);
80              int y = s.indexOf(_END, x + _BEGIN.length());
81  
82              if ((x == -1) || (y == -1)) {
83                  sb.append(s.substring(pos, s.length()));
84  
85                  break;
86              }
87              else {
88                  sb.append(s.substring(pos, x));
89  
90                  String importFile = s.substring(x + _BEGIN.length(), y);
91  
92                  String importContent = _fileUtil.read(
93                      cssDir + "/" + importFile);
94  
95                  String importFilePath = "";
96  
97                  if (importFile.lastIndexOf("/") != -1) {
98                      importFilePath = "/" + importFile.substring(
99                          0, importFile.lastIndexOf("/") + 1);
100                 }
101 
102                 importContent = replaceImports(
103                     cssDir + importFilePath, importContent, level + 1);
104 
105                 // LEP-7540
106 
107                 String relativePath = StringPool.BLANK;
108 
109                 for (int i = 0; i < level; i++) {
110                     relativePath += "../";
111                 }
112 
113                 importContent = StringUtil.replace(
114                     importContent,
115                     new String[] {
116                         "url('" + relativePath,
117                         "url(\"" + relativePath,
118                         "url(" + relativePath
119                     },
120                     new String[] {
121                         "url('[$TEMP_RELATIVE_PATH$]",
122                         "url(\"[$TEMP_RELATIVE_PATH$]",
123                         "url([$TEMP_RELATIVE_PATH$]"
124                     });
125 
126                 importContent = StringUtil.replace(
127                     importContent, "[$TEMP_RELATIVE_PATH$]", StringPool.BLANK);
128 
129                 sb.append(importContent);
130 
131                 pos = y + _END.length();
132             }
133         }
134 
135         return sb.toString();
136     }
137 
138     private static final String _BEGIN = "@import url(";
139 
140     private static final String _END = ");";
141 
142     private static FileImpl _fileUtil = FileImpl.getInstance();
143 
144 }