1 package net.sf.flock.parser;
2
3 /***
4 * Utility class for dealing with HTML entities.
5 *
6 * @version $Revision: 1.1 $
7 * @author $Author: phraktle $
8 */
9 public class HTMLUtil {
10
11 private final static String[][] ENTITIES =
12 {{ "<" , "<" } ,
13 { ">" , ">" } ,
14 { "&" , "&" } ,
15 { """ , "\"" } ,
16 { "à" , "?" } ,
17 { "À" , "?" } ,
18 { "â" , "?" } ,
19 { "ä" , "?" } ,
20 { "Ä" , "?" } ,
21 { "Â" , "?" } ,
22 { "å" , "?" } ,
23 { "Å" , "?" } ,
24 { "æ" , "?" } ,
25 { "Æ" , "?" } ,
26 { "ç" , "?" } ,
27 { "Ç" , "?" } ,
28 { "é" , "?" } ,
29 { "É" , "?" } ,
30 { "è" , "?" } ,
31 { "È" , "?" } ,
32 { "ê" , "?" } ,
33 { "Ê" , "?" } ,
34 { "ë" , "?" } ,
35 { "Ë" , "?" } ,
36 { "ï" , "?" } ,
37 { "Ï" , "?" } ,
38 { "ô" , "?" } ,
39 { "Ô" , "?" } ,
40 { "ö" , "?" } ,
41 { "Ö" , "?" } ,
42 { "ø" , "?" } ,
43 { "Ø" , "?" } ,
44 { "ß" , "?" } ,
45 { "ù" , "?" } ,
46 { "Ù" , "?" } ,
47 { "û" , "?" } ,
48 { "Û" , "?" } ,
49 { "ü" , "?" } ,
50 { "Ü" , "?" } ,
51 { " " , " " } ,
52 { "®" , "\u00a9" } ,
53 { "©" , "\u00ae" } ,
54 { "€" , "\u20a0" } };
55
56
57 public static String unescape(String source) {
58 if (source==null || source.indexOf('&')==-1) {
59 // no entities
60 return source;
61 }
62 int len = source.length();
63 StringBuffer result = new StringBuffer(len);
64 for (int i=0; i<len; i++) {
65 int startPos = source.indexOf('&', i);
66
67 if (startPos!=i) {
68 // we skipped some chars, append them to result
69 result.append(source.substring(i, startPos==-1 ? len : startPos));
70 }
71
72 if (startPos==-1) {
73 // no more entities
74 break;
75 }
76
77 int endPos = source.indexOf(';', startPos);
78 if (endPos==-1) {
79 // broken entity
80 result.append( source.substring(startPos) );
81 break;
82 }
83
84 String entity = source.substring(startPos, endPos+1);
85 int p=0;
86 for (; p<ENTITIES.length; p++) {
87 if (entity.equals(ENTITIES[p][0])) {
88 result.append( ENTITIES[p][1] );
89 break;
90 }
91 }
92 if (p>=ENTITIES.length) {
93 // no entity replacement found, leave as-is
94 result.append(entity);
95 }
96
97 // skip ahead a littlebit
98 i=endPos;
99 }
100 return result.toString();
101 }
102
103 public static String escape(String source) {
104 if (source==null)
105 return null;
106
107 StringBuffer result = new StringBuffer(source.length());
108
109 for (int i=0;i<source.length();i++) {
110
111 char ch = source.charAt(i);
112
113 if ((int)ch>127) {
114 result.append("&#").append((int)ch).append(';');
115 } else {
116 result.append(ch);
117 }
118 }
119 return result.toString();
120 }
121
122 }
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