Java2HTMLEntityReader


1   /*******************************************************************************
2    * Copyright (c) 2000, 2004 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials 
4    * are made available under the terms of the Common Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/cpl-v10.html
7    * 
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.jdt.internal.ui.text.comment;
12  
13  import java.io.Reader  ;
14  import java.util.HashMap  ;
15  import java.util.Map  ;
16  import org.eclipse.jdt.internal.ui.text.SubstitutionTextReader;
17  
18  
19  /**
20   * <code>SubstitutionTextReader</code> that will substitute html entities for
21   * html symbols encountered in the original text. Line breaks and whitespaces
22   * are preserved.
23   * 
24   * @since 3.0
25   */
26  public class Java2HTMLEntityReader extends SubstitutionTextReader {
27  
28      /** The hardcoded entity map. */
29      private static final Map   fgEntityLookup;
30      
31      static {
32          fgEntityLookup= new HashMap  (7);
33          fgEntityLookup.put("<", "&lt;"); //$NON-NLS-1$ //$NON-NLS-2$
34          fgEntityLookup.put(">", "&gt;"); //$NON-NLS-1$ //$NON-NLS-2$
35          fgEntityLookup.put("&", "&amp;"); //$NON-NLS-1$ //$NON-NLS-2$
36          fgEntityLookup.put("^", "&circ;"); //$NON-NLS-1$ //$NON-NLS-2$
37          fgEntityLookup.put("~", "&tilde;"); //$NON-NLS-2$ //$NON-NLS-1$
38          fgEntityLookup.put("\"", "&quot;"); //$NON-NLS-1$ //$NON-NLS-2$
39      }
40  
41      /**
42       * Creates a new instance that will read from <code>reader</code>
43       * 
44       * @param reader the source reader
45       */
46      public Java2HTMLEntityReader(Reader   reader) {
47          super(reader);
48          setSkipWhitespace(false);
49      }
50  
51      /*
52       * @see org.eclipse.jdt.internal.ui.text.SubstitutionTextReader#computeSubstitution(int)
53       */
54      protected String   computeSubstitution(int c) {
55          String   lookup= (String  ) fgEntityLookup.get(String.valueOf((char) c));
56          return lookup;
57      }
58  }
59
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