PDFStringHelper


1   /*
2    * $Id: PDFStringHelper.java,v 1.1.1.1 2001/10/29 19:51:08 ezb Exp $
3    *
4    * $Date: 2001/10/29 19:51:08 $
5    *
6    * Copyright (C) 2001  Eric Z. Beard, ericzbeard@hotmail.com
7    * 
8    *
9    * This library is free software; you can redistribute it and/or
10   * modify it under the terms of the GNU Lesser General Public
11   * License as published by the Free Software Foundation; either
12   * version 2.1 of the License, or (at your option) any later version.
13   *
14   * This library is distributed in the hope that it will be useful,
15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17   * Lesser General Public License for more details.
18   *
19   * You should have received a copy of the GNU Lesser General Public
20   * License along with this library; if not, write to the Free Software
21   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22   * 
23   */
24  
25  package gnu.jpdf;
26  
27  /**
28   * String manipulation methods
29   *
30   * @author Eric Z. Beard, ericzbeard@hotmail.com
31   * @author $Author: ezb $
32   * @version $Revision: 1.1.1.1 $, $Date: 2001/10/29 19:51:08 $
33   *
34   */
35  public class PDFStringHelper
36  {
37    /**
38     * This converts a string into PDF. It prefixes ( or ) with \
39     * and wraps the string in a ( ) pair.
40     * @param s String to convert
41     * @return String that can be placed in a PDF (or Postscript) stream
42     */
43    public static String   makePDFString(String   s) {
44      if(s.indexOf("(")>-1)
45        s = replace(s,"(","\\(");
46      
47      if(s.indexOf(")")>-1)
48        s = replace(s,")","\\)");
49      
50      return "("+s+")";
51    }
52    
53    /**
54     * Helper method for toString()
55     * @param s source string
56     * @param f string to remove
57     * @param t string to replace f
58     * @return string with f replaced by t
59     */
60    private static String   replace(String   source,
61                                  String   removeThis,
62                                  String   replaceWith) {
63      StringBuffer   b = new StringBuffer  ();
64      int p = 0, c=0;
65      
66      while(c>-1) {
67        if((c = source.indexOf(removeThis,p)) > -1) {
68          b.append(source.substring(p,c));
69          b.append(replaceWith);
70          p=c+1;
71        }
72      }
73      
74      // include any remaining text
75      if(p<source.length())
76        b.append(source.substring(p));
77      
78      return b.toString();
79    }
80  } // end class PDFStringHelper
81
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