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Java > Open Source Codes > de > java2html > util > HtmlUtilities


1 package de.java2html.util;
2
3 import java.util.Hashtable JavaDoc;
4
5 /**
6  * Some methods for converting text to valid HTML.
7  *
8  * For questions, suggestions, bug-reports, enhancement-requests etc.
9  * I may be contacted at:
10  * <a HREF="mailto:markus@jave.de">markus@jave.de</a>
11  *
12  * The Java2html home page is located at:
13  * <a HREF="http://www.java2html.de">http://www.java2html.de</a>
14  *
15  * @author <a HREF="mailto:markus@jave.de">Markus Gebhard</a>
16  * @version 2.0, 05/07/02
17  *
18  * Copyright (C) Markus Gebhard 2000-2002
19  *
20  * This program is free software; you can redistribute it and/or
21  * modify it under the terms of the GNU General Public License
22  * as published by the Free Software Foundation; either version 2
23  * of the License, or (at your option) any later version.
24  *
25  * This program is distributed in the hope that it will be useful,
26  * but WITHOUT ANY WARRANTY; without even the implied warranty of
27  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28  * GNU General Public License for more details.
29  *
30  * You should have received a copy of the GNU General Public License
31  * along with this program; if not, write to the Free Software
32  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
33  */
34 public class HtmlUtilities {
35   private static Hashtable JavaDoc entityTableEncode;
36
37   private final static String JavaDoc[] ENTITIES = {
38       //IGNORE (during encoding!!)
39 " ", //$NON-NLS-1$
40 " ", //$NON-NLS-1$
41 "-", //$NON-NLS-1$
42 "-", //$NON-NLS-1$
43 "'", //$NON-NLS-1$
44 "'", //$NON-NLS-1$
45 "`", //$NON-NLS-1$
46 "`", //$NON-NLS-1$
47
48       //UPPERCASE
49 "&Uuml;", //$NON-NLS-1$
50 "Ü", //$NON-NLS-1$
51 "&Auml;", //$NON-NLS-1$
52 "Ä", //$NON-NLS-1$
53 "&Ouml;", //$NON-NLS-1$
54 "Ö", //$NON-NLS-1$
55 "&Euml;", //$NON-NLS-1$
56 "Ë", //$NON-NLS-1$
57 "&Ccedil;", //$NON-NLS-1$
58 "Ç", //$NON-NLS-1$
59 "&AElig;", //$NON-NLS-1$
60 "Æ", //$NON-NLS-1$
61 "&Aring;", //$NON-NLS-1$
62 "Å", //$NON-NLS-1$
63 "&Oslash;", //$NON-NLS-1$
64 "Ø", //$NON-NLS-1$
65
66       //OTHERS -> ignorecase!
67 "&uuml;", //$NON-NLS-1$
68 "ü", //$NON-NLS-1$
69 "&auml;", //$NON-NLS-1$
70 "ä", //$NON-NLS-1$
71 "&ouml;", //$NON-NLS-1$
72 "ö", //$NON-NLS-1$
73 "&euml;", //$NON-NLS-1$
74 "ë", //$NON-NLS-1$
75 "&ccedil;", //$NON-NLS-1$
76 "ç", //$NON-NLS-1$
77 "&aring;", //$NON-NLS-1$
78 "å", //$NON-NLS-1$
79 "&oslash;", //$NON-NLS-1$
80 "ø", //$NON-NLS-1$
81 "&grave;", //$NON-NLS-1$
82 "`", //$NON-NLS-1$
83 "&agrave;", //$NON-NLS-1$
84 "à", //$NON-NLS-1$
85 "&egrave;", //$NON-NLS-1$
86 "è", //$NON-NLS-1$
87 "&igrave;", //$NON-NLS-1$
88 "ì", //$NON-NLS-1$
89 "&ograve;", //$NON-NLS-1$
90 "ò", //$NON-NLS-1$
91 "&ugrave;", //$NON-NLS-1$
92 "ù", //$NON-NLS-1$
93 "&amp;", //$NON-NLS-1$
94 "&", //$NON-NLS-1$
95 "&#34;", //$NON-NLS-1$
96 "\"", //$NON-NLS-1$
97 // same as &quot; - but &quot; is not part of HTML3.2!!!
98 "&szlig;", //$NON-NLS-1$
99 "ß", //$NON-NLS-1$
100 "&nbsp;", //$NON-NLS-1$
101 " ", //$NON-NLS-1$
102 "&gt;", //$NON-NLS-1$
103 ">", //$NON-NLS-1$
104 "&lt;", //$NON-NLS-1$
105 "<", //$NON-NLS-1$
106 "&copy;", //$NON-NLS-1$
107 "(C)", //$NON-NLS-1$
108 "&cent;", //$NON-NLS-1$
109 "¢", //$NON-NLS-1$
110 "&pound;", //$NON-NLS-1$
111 "£", //$NON-NLS-1$
112 "&laquo;", //$NON-NLS-1$
113 "«", //$NON-NLS-1$
114 "&raquo;", //$NON-NLS-1$
115 "»", //$NON-NLS-1$
116 "&reg;", //$NON-NLS-1$
117 "(R)", //$NON-NLS-1$
118 "&middot;", //$NON-NLS-1$
119 " - ", //$NON-NLS-1$
120 "&times;", //$NON-NLS-1$
121 " x ", //$NON-NLS-1$
122 "&acute;", //$NON-NLS-1$
123 "'", //$NON-NLS-1$ //$NON-NLS-1$
124 "&aacute;", //$NON-NLS-1$
125 "á", //$NON-NLS-1$
126 "&uacute;", //$NON-NLS-1$
127 "ú", //$NON-NLS-1$
128 "&oacute;", //$NON-NLS-1$
129 "ó", //$NON-NLS-1$
130 "&eacute;", //$NON-NLS-1$
131 "é", //$NON-NLS-1$
132 "&iacute;", //$NON-NLS-1$
133 "í", //$NON-NLS-1$
134 "&ntilde;", //$NON-NLS-1$
135 "ñ", //$NON-NLS-1$
136 "&sect;", //$NON-NLS-1$
137 "§", //$NON-NLS-1$
138 "&egrave;", //$NON-NLS-1$
139 "è", //$NON-NLS-1$
140 "&icirc;", //$NON-NLS-1$
141 "î", //$NON-NLS-1$
142 "&ocirc;", //$NON-NLS-1$
143 "ô", //$NON-NLS-1$
144 "&acirc;", //$NON-NLS-1$
145 "â", //$NON-NLS-1$
146 "&ucirc;", //$NON-NLS-1$
147 "û", //$NON-NLS-1$
148 "&ecirc;", //$NON-NLS-1$
149 "ê", //$NON-NLS-1$
150 "&aelig;", //$NON-NLS-1$
151 "æ", //$NON-NLS-1$
152 "&iexcl;", //$NON-NLS-1$
153 "¡", //$NON-NLS-1$
154 "&#151;", //$NON-NLS-1$
155 "-", //$NON-NLS-1$
156 "&#0151;", //$NON-NLS-1$
157 "-", //$NON-NLS-1$
158 "&#0146;", //$NON-NLS-1$
159 "'", //$NON-NLS-1$
160 "&#146;", //$NON-NLS-1$
161 "'", //$NON-NLS-1$
162 "&#0145;", //$NON-NLS-1$
163 "'", //$NON-NLS-1$
164 "&#145;", //$NON-NLS-1$
165 "'", //$NON-NLS-1$
166 "&quot;", //$NON-NLS-1$
167 "\"", }; //$NON-NLS-1$
168
169   private HtmlUtilities() {
170     //No instance available
171 }
172
173   protected static void buildEntityTables() {
174     entityTableEncode = new Hashtable JavaDoc(ENTITIES.length);
175
176     for (int i = 0; i < ENTITIES.length; i += 2) {
177       if (!entityTableEncode.containsKey(ENTITIES[i + 1]))
178         entityTableEncode.put(ENTITIES[i + 1], ENTITIES[i]);
179     }
180   }
181
182   /**
183    * Converts a String to HTML by converting all special characters to
184    * HTML-entities.
185    */
186   public final static String JavaDoc encode(String JavaDoc s, String JavaDoc ignore) {
187     return encode(s, 0, s.length(), ignore);
188   }
189
190   /**
191    * Converts a String to HTML by converting all special characters to
192    * HTML-entities. Only s,substring(start,end) will be encoded.
193    */
194   public final static String JavaDoc encode(String JavaDoc s, int start, int end, String JavaDoc ignore) {
195     if (entityTableEncode == null)
196       buildEntityTables();
197
198     StringBuffer JavaDoc sb = new StringBuffer JavaDoc((end - start) * 2);
199     char ch;
200     for (int i = start; i < end; ++i) {
201       ch = s.charAt(i);
202       if ((ch >= 63 && ch <= 90) || (ch >= 97 && ch <= 122) || ignore.indexOf(ch) != -1)
203         sb.append(ch);
204       else
205         sb.append(encodeSingleChar(String.valueOf(ch)));
206     }
207     return sb.toString();
208   }
209
210   /**
211    * Converts a single character to HTML
212    */
213   protected final static String JavaDoc encodeSingleChar(String JavaDoc ch) {
214     String JavaDoc s = (String JavaDoc) entityTableEncode.get(ch);
215     return (s == null) ? ch : s;
216   }
217
218   /**
219    * Converts the given Color object to a String contaning the html
220    * description of the color. E.g.: #FF8080.
221    */
222   public final static String JavaDoc toHTML(RGB color) {
223     String JavaDoc red = Integer.toHexString(color.getRed());
224     String JavaDoc green = Integer.toHexString(color.getGreen());
225     String JavaDoc blue = Integer.toHexString(color.getBlue());
226
227     if (red.length() == 1) {
228       red = "0" + red; //$NON-NLS-1$
229 }
230     if (green.length() == 1) {
231       green = "0" + green; //$NON-NLS-1$
232 }
233     if (blue.length() == 1) {
234       blue = "0" + blue; //$NON-NLS-1$
235 }
236
237     return "#" + red + green + blue; //$NON-NLS-1$
238 }
239 }
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