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.FileUtil;
26  import com.liferay.portal.kernel.util.StringPool;
27  import com.liferay.portal.kernel.util.StringUtil;
28  import com.liferay.portal.util.InitUtil;
29  
30  import java.io.File;
31  
32  /**
33   * <a href="CSSBuilder.java.html"><b><i>View Source</i></b></a>
34   *
35   * @author Brian Wing Shun Chan
36   *
37   */
38  public class CSSBuilder {
39  
40      public static void main(String[] args) {
41          InitUtil.initWithSpring();
42  
43          if (args.length == 2) {
44              new CSSBuilder(args[0], args[1]);
45          }
46          else {
47              throw new IllegalArgumentException();
48          }
49      }
50  
51      public CSSBuilder(String cssDir, String mergedFile) {
52          try {
53              File mainCssFile = new File(cssDir + "/main.css");
54  
55              if (!mainCssFile.exists()) {
56                  System.out.println(
57                      "Do not pack " + cssDir +
58                          "/main.css because it does not exist.");
59  
60                  return;
61              }
62  
63              String content = FileUtil.read(mainCssFile);
64  
65              content = replaceImports(cssDir, content, 0);
66  
67              FileUtil.write(mergedFile, content);
68          }
69          catch (Exception e) {
70              e.printStackTrace();
71          }
72      }
73  
74      public String replaceImports(String cssDir, String s, int level)
75          throws Exception {
76  
77          StringBuilder sb = new StringBuilder(s.length());
78  
79          int pos = 0;
80  
81          while (true) {
82              int x = s.indexOf(_BEGIN, pos);
83              int y = s.indexOf(_END, x + _BEGIN.length());
84  
85              if ((x == -1) || (y == -1)) {
86                  sb.append(s.substring(pos, s.length()));
87  
88                  break;
89              }
90              else {
91                  sb.append(s.substring(pos, x));
92  
93                  String importFile = s.substring(x + _BEGIN.length(), y);
94  
95                  String importContent = FileUtil.read(cssDir + "/" + importFile);
96  
97                  String importFilePath = "";
98  
99                  if (importFile.lastIndexOf("/") != -1) {
100                     importFilePath = "/" + importFile.substring(
101                         0, importFile.lastIndexOf("/") + 1);
102                 }
103 
104                 importContent = replaceImports(
105                     cssDir + importFilePath, importContent, level + 1);
106 
107                 // LEP-7540
108 
109                 String relativePath = StringPool.BLANK;
110 
111                 for (int i = 0; i < level; i++) {
112                     relativePath += "../";
113                 }
114 
115                 importContent = StringUtil.replace(
116                     importContent,
117                     new String[] {
118                         "url('" + relativePath,
119                         "url(\"" + relativePath,
120                         "url(" + relativePath
121                     },
122                     new String[] {
123                         "url('[$TEMP_RELATIVE_PATH$]",
124                         "url(\"[$TEMP_RELATIVE_PATH$]",
125                         "url([$TEMP_RELATIVE_PATH$]"
126                     });
127 
128                 importContent = StringUtil.replace(
129                     importContent, "[$TEMP_RELATIVE_PATH$]", StringPool.BLANK);
130 
131                 sb.append(importContent);
132 
133                 pos = y + _END.length();
134             }
135         }
136 
137         return sb.toString();
138     }
139 
140     private static final String _BEGIN = "@import url(";
141 
142     private static final String _END = ");";
143 
144 }