TKHtmlConverter


1   /*
2    * $Header: /cvsroot/webman-cms/source/webman/com/teamkonzept/lib/TKHtmlConverter.java,v 1.5 2000/05/22 15:01:20 careck Exp $
3    *
4    */
5   package com.teamkonzept.lib;
6   
7   import java.util.*;
8   
9   /**
10      Konvertierungsklasse fuer HTML-Text-Codierung
11  */
12  public class TKHtmlConverter extends TKConverter {
13      public final static String   CONV_ID = "HTML";
14      public final static String   CONV_NAME = "HTML-ISO-8859_1";
15  
16      public String   getName() 
17      {
18          return CONV_NAME;
19      }
20      
21      public final static String  [] HTML_CODES = {
22  /*  0*/ null, null, null, null, null, null, null, null, null, null,
23  /* 10*/ null, null, null, null, null, null, null, null, null, null,
24  /* 20*/ null, null, null, null, null, null, null, null, null, null,
25  /* 30*/ null, null, null, null, "quot", null, null, null, "amp", null,
26  /* 40*/ null, null, null, null, null, null, null, null, null, null,
27  /* 50*/ null, null, null, null, null, null, null, null, null, null,
28  /* 60*/ "lt", null, "gt", null, null, null, null, null, null, null,
29  /* 70*/ null, null, null, null, null, null, null, null, null, null,
30  /* 80*/ null, null, null, null, null, null, null, null, null, null,
31  /* 90*/ null, null, null, null, null, null, null, null, null, null,
32  /*100*/ null, null, null, null, null, null, null, null, null, null,
33  /*110*/ null, null, null, null, null, null, null, null, null, null,
34  /*120*/ null, null, null, null, null, null, null, null, null, null,
35  /*130*/ null, null, /*"quot"*/null, null, null, null, null, null, null, null,
36  /*140*/ null, null, null, null, null, /*"#39"*/null, /*"#39*/null, null, null, null,
37  /*150*/ null, null, null, null, null, null, null, null, null, null,
38  /*160*/ "nbsp", null, null, null, null, null, null, null, null, null,
39  /*170*/ null, null, null, "shy", null, null, null, null, null, null,
40  /*180*/ null, null, null, null, null, null, null, null, null, null,
41  /*190*/ null, null, "Agrave", "Aacute", "Acirc", "Atilde", "Auml", "Aring", "AElig", "Ccedil",
42  /*200*/ "Egrave", "Eacute", "Ecirc", "Euml", "Igrave", "Iacute", "Icirc", "Iuml", "ETH", "Ntilde",
43  /*210*/ "Ograve", "Oacute", "Ocirc", "Otilde", "Ouml", null, "Oslash", "Ugrave", "Uacute", "Ucirc",
44  /*220*/ "Uuml", "Yacute", "THORN", "szlig", "agrave", "aacute", "acirc", "atilde", "auml", "aring",
45  /*230*/ "aelig", "ccedil", "egrave", "eacute", "ecirc", "euml", "igrave", "iacute", "icirc", "iuml",
46  /*240*/ "eth", "ntilde", "ograve", "oacute", "ocirc", "otilde", "ouml", null, "oslash", "ugrave",
47  /*250*/ "uacute", "ucirc", "uuml", "yacute", "thorn", "yuml"
48      };
49      
50      public final static byte AMPERCENT = (byte) '&';
51      public final static byte HASH = (byte) '#';
52      public final static byte SEMICOLON = (byte) ';';
53      public static Hashtable NAME_HASH = null;
54      
55      public int getMaxBytesPerChar() 
56      {
57          return 8;
58      }
59      
60      public int minCharSize(int byteCount) 
61      {
62          return byteCount;
63      }
64      
65      public synchronized Hashtable getNameHash()
66      {
67          if( NAME_HASH != null ) return NAME_HASH;
68          NAME_HASH = new Hashtable(38);
69          String   html;
70          for( int i=0; i<=255; i++ ) {
71              if( (html = HTML_CODES[i]) != null ) NAME_HASH.put( html, new Integer  (i) );
72          }
73          return NAME_HASH;
74      }
75      
76      public int charsToBytes(char src[], byte dst[], int srcBegin, int length, int dstBegin) 
77      {
78          int lastPos = srcBegin+length;
79          int firstPos = dstBegin;
80          for( int i=srcBegin; i<lastPos; i++ ) {
81              char c = src[i];
82              byte b = (byte) c;
83              int code = (int) c;
84              String   subst = HTML_CODES[ code ];
85              if( subst == null ) {
86                  //if( c >= ' ' && c <='\u0080' ) {
87                  if( c <='\u0080' ) {
88                      dst[ dstBegin++ ] = b;
89                  }
90                  else if( c < '\u0100' ) {
91                      dst[ dstBegin++ ] = AMPERCENT;
92                      dst[ dstBegin++ ] = HASH;
93                      dst[ dstBegin++ ] = (byte) Character.forDigit( ( code / 100 ), 10 );
94                      dst[ dstBegin++ ] = (byte) Character.forDigit( ( code % 100 / 10  ), 10 );
95                      dst[ dstBegin++ ] = (byte) Character.forDigit( ( code % 10  ), 10 );
96                      dst[ dstBegin++ ] = SEMICOLON;
97                  }
98              }
99              else {
100                 dst[ dstBegin++ ] = AMPERCENT;
101                 int len = subst.length();
102                 subst.getBytes( 0, len, dst, dstBegin );
103                 dstBegin += len;
104                 dst[ dstBegin++ ] = SEMICOLON;
105             }
106         }
107         
108         return dstBegin - firstPos;
109     }
110     
111     public int bytesToChars(byte src[], char dst[], int srcBegin, int length, int dstBegin) 
112     {
113         int lastPos = srcBegin+length;
114         int firstPos = dstBegin;
115         int i=srcBegin;
116         Hashtable nameHash = getNameHash();
117         
118         while( i<lastPos ) {
119             byte b = src[i++];
120             if( b == AMPERCENT ) {
121                 int startPos = i;
122                 while( src[i] != SEMICOLON ) i++;
123                 if( src[i] == HASH ) {
124                     String   decStr = new String  ( src, 0, startPos+1, i-startPos-1 );
125                     dst[dstBegin++] = (char) Integer.parseInt( decStr );
126                 }
127                 else {
128                     String   code = new String  ( src, 0, startPos, i-startPos );
129                     dst[dstBegin++] = 
130                         (char) ((Integer  )nameHash.get(code)).intValue();
131                 }
132                 i++;
133             }
134             else {
135                 dst[dstBegin++] = (char) b;
136             }
137         }
138         return dstBegin - firstPos;
139     }
140     
141 }
142 
143
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