Latin9Writer


1   /* Copyright 2002, 2003 Elliotte Rusty Harold
2      
3      This library is free software; you can redistribute it and/or modify
4      it under the terms of version 2.1 of the GNU Lesser General Public 
5      License as published by the Free Software Foundation.
6      
7      This library is distributed in the hope that it will be useful,
8      but WITHOUT ANY WARRANTY; without even the implied warranty of
9      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
10     GNU Lesser General Public License for more details.
11     
12     You should have received a copy of the GNU Lesser General Public
13     License along with this library; if not, write to the 
14     Free Software Foundation, Inc., 59 Temple Place, Suite 330, 
15     Boston, MA 02111-1307  USA
16     
17     You can contact Elliotte Rusty Harold by sending e-mail to
18     elharo@metalab.unc.edu. Please include the word "XOM" in the
19     subject line. The XOM home page is located at http://www.xom.nu/
20  */
21  
22  package nu.xom;
23  
24  import java.io.Writer  ;
25  
26  /**
27   * <p>
28   *  ISO 8859-9 for Western Europe. Includes the Euro sign and
29   *  several uncommon French letters. otherwise the same as 
30   *  Latin-1. 
31   * </p>
32   * 
33   * @author Elliotte Rusty Harold
34   * @version 1.0
35   *
36   */
37  class Latin9Writer extends TextWriter {
38  
39      /**
40       * <p>
41       *   Creates a new <code>TextWriter</code> for the
42       *   ISO-8859-15 (Latin-9) character encoding.
43       * </p>
44      *
45       * @param out the <code>Writer</code> on which the text will be written
46       * @param encoding the character set used by the <code>Writer</code>
47       */
48      Latin9Writer(Writer   out, String   encoding) {
49          super(out, encoding);
50      }
51  
52      /**
53       * <p>
54       *   Returns true if and only if this character 
55       *   needs to be replaced by a character reference when
56       *   output in this encoding.
57       * </p>
58       * 
59       * 
60       * @see nu.xom.TextWriter#needsEscaping(char)
61       */
62      boolean needsEscaping(char c) {
63          if (c <= 0xA3 ) return false;      
64          if (c == 0x20AC) return false; // EURO SIGN
65          
66          switch (c) {  // Latin-1 overlap
67              case 0x00A5: return false; // YEN SIGN
68              case 0x00A6: return true;  // place holder to enable table lookup
69              case 0x00A7: return false; // SECTION SIGN
70              case 0x00A8: return true;  // place holder to enable table lookup
71              case 0x00A9: return false; // COPYRIGHT SIGN
72              case 0x00AA: return false; // FEMININE ORDINAL INDICATOR
73              case 0x00AB: return false; // LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
74              case 0x00AC: return false; // NOT SIGN
75              case 0x00AD: return false; // SOFT HYPHEN
76              case 0x00AE: return false; // REGISTERED SIGN
77              case 0x00AF: return false; // MACRON
78              case 0x00B0: return false; // DEGREE SIGN
79              case 0x00B1: return false; // PLUS-MINUS SIGN
80              case 0x00B2: return false; // SUPERSCRIPT TWO
81              case 0x00B3: return false; // SUPERSCRIPT THREE
82              case 0x00B4: return true;  // place holder to enable table lookup
83              case 0x00B5: return false; // MICRO SIGN
84              case 0x00B6: return false; // PILCROW SIGN
85              case 0x00B7: return false; // MIDDLE DOT
86              case 0x00B8: return true;  // place holder to enable table lookup
87              case 0x00B9: return false; // SUPERSCRIPT ONE
88              case 0x00BA: return false; // MASCULINE ORDINAL INDICATOR
89              case 0x00BB: return false; // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
90              case 0x00BC: return true;  // place holder to enable table lookup
91              case 0x00BD: return true;  // place holder to enable table lookup
92              case 0x00BE: return true;  // place holder to enable table lookup
93              case 0x00BF: return false; // INVERTED QUESTION MARK
94              case 0x00C0: return false; // LATIN CAPITAL LETTER A WITH GRAVE
95              case 0x00C1: return false; // LATIN CAPITAL LETTER A WITH ACUTE
96              case 0x00C2: return false; // LATIN CAPITAL LETTER A WITH CIRCUMFLEX
97              case 0x00C3: return false; // LATIN CAPITAL LETTER A WITH TILDE
98              case 0x00C4: return false; // LATIN CAPITAL LETTER A WITH DIAERESIS
99              case 0x00C5: return false; // LATIN CAPITAL LETTER A WITH RING ABOVE
100             case 0x00C6: return false; // LATIN CAPITAL LETTER AE
101             case 0x00C7: return false; // LATIN CAPITAL LETTER C WITH CEDILLA
102             case 0x00C8: return false; // LATIN CAPITAL LETTER E WITH GRAVE
103             case 0x00C9: return false; // LATIN CAPITAL LETTER E WITH ACUTE
104             case 0x00CA: return false; // LATIN CAPITAL LETTER E WITH CIRCUMFLEX
105             case 0x00CB: return false; // LATIN CAPITAL LETTER E WITH DIAERESIS
106             case 0x00CC: return false; // LATIN CAPITAL LETTER I WITH GRAVE
107             case 0x00CD: return false; // LATIN CAPITAL LETTER I WITH ACUTE
108             case 0x00CE: return false; // LATIN CAPITAL LETTER I WITH CIRCUMFLEX
109             case 0x00CF: return false; // LATIN CAPITAL LETTER I WITH DIAERESIS
110             case 0x00D0: return false; // LATIN CAPITAL LETTER ETH
111             case 0x00D1: return false; // LATIN CAPITAL LETTER N WITH TILDE
112             case 0x00D2: return false; // LATIN CAPITAL LETTER O WITH GRAVE
113             case 0x00D3: return false; // LATIN CAPITAL LETTER O WITH ACUTE
114             case 0x00D4: return false; // LATIN CAPITAL LETTER O WITH CIRCUMFLEX
115             case 0x00D5: return false; // LATIN CAPITAL LETTER O WITH TILDE
116             case 0x00D6: return false; // LATIN CAPITAL LETTER O WITH DIAERESIS
117             case 0x00D7: return false; // MULTIPLICATION SIGN
118             case 0x00D8: return false; // LATIN CAPITAL LETTER O WITH STROKE
119             case 0x00D9: return false; // LATIN CAPITAL LETTER U WITH GRAVE
120             case 0x00DA: return false; // LATIN CAPITAL LETTER U WITH ACUTE
121             case 0x00DB: return false; // LATIN CAPITAL LETTER U WITH CIRCUMFLEX
122             case 0x00DC: return false; // LATIN CAPITAL LETTER U WITH DIAERESIS
123             case 0x00DD: return false; // LATIN CAPITAL LETTER Y WITH ACUTE
124             case 0x00DE: return false; // LATIN CAPITAL LETTER THORN
125             case 0x00DF: return false; // LATIN SMALL LETTER SHARP S
126             case 0x00E0: return false; // LATIN SMALL LETTER A WITH GRAVE
127             case 0x00E1: return false; // LATIN SMALL LETTER A WITH ACUTE
128             case 0x00E2: return false; // LATIN SMALL LETTER A WITH CIRCUMFLEX
129             case 0x00E3: return false; // LATIN SMALL LETTER A WITH TILDE
130             case 0x00E4: return false; // LATIN SMALL LETTER A WITH DIAERESIS
131             case 0x00E5: return false; // LATIN SMALL LETTER A WITH RING ABOVE
132             case 0x00E6: return false; // LATIN SMALL LETTER AE
133             case 0x00E7: return false; // LATIN SMALL LETTER C WITH CEDILLA
134             case 0x00E8: return false; // LATIN SMALL LETTER E WITH GRAVE
135             case 0x00E9: return false; // LATIN SMALL LETTER E WITH ACUTE
136             case 0x00EA: return false; // LATIN SMALL LETTER E WITH CIRCUMFLEX
137             case 0x00EB: return false; // LATIN SMALL LETTER E WITH DIAERESIS
138             case 0x00EC: return false; // LATIN SMALL LETTER I WITH GRAVE
139             case 0x00ED: return false; // LATIN SMALL LETTER I WITH ACUTE
140             case 0x00EE: return false; // LATIN SMALL LETTER I WITH CIRCUMFLEX
141             case 0x00EF: return false; // LATIN SMALL LETTER I WITH DIAERESIS
142             case 0x00F0: return false; // LATIN SMALL LETTER ETH
143             case 0x00F1: return false; // LATIN SMALL LETTER N WITH TILDE
144             case 0x00F2: return false; // LATIN SMALL LETTER O WITH GRAVE
145             case 0x00F3: return false; // LATIN SMALL LETTER O WITH ACUTE
146             case 0x00F4: return false; // LATIN SMALL LETTER O WITH CIRCUMFLEX
147             case 0x00F5: return false; // LATIN SMALL LETTER O WITH TILDE
148             case 0x00F6: return false; // LATIN SMALL LETTER O WITH DIAERESIS
149             case 0x00F7: return false; // DIVISION SIGN
150             case 0x00F8: return false; // LATIN SMALL LETTER O WITH STROKE
151             case 0x00F9: return false; // LATIN SMALL LETTER U WITH GRAVE
152             case 0x00FA: return false; // LATIN SMALL LETTER U WITH ACUTE
153             case 0x00FB: return false; // LATIN SMALL LETTER U WITH CIRCUMFLEX
154             case 0x00FC: return false; // LATIN SMALL LETTER U WITH DIAERESIS
155             case 0x00FD: return false; // LATIN SMALL LETTER Y WITH ACUTE
156             case 0x00FE: return false; // LATIN SMALL LETTER THORN
157             case 0x00FF: return false; // LATIN SMALL LETTER Y WITH DIAERESIS
158         }
159         switch (c) { // uncommon French letters
160             case 0x0152: return false; // LATIN CAPITAL LIGATURE OE
161             case 0x0153: return false; // LATIN SMALL LIGATURE OE
162             case 0x0154: return true;  // place holder to enable table lookup
163             case 0x0155: return true;  // place holder to enable table lookup
164             case 0x0156: return true;  // place holder to enable table lookup
165             case 0x0157: return true;  // place holder to enable table lookup
166             case 0x0158: return true;  // place holder to enable table lookup
167             case 0x0159: return true;  // place holder to enable table lookup
168             case 0x015A: return true;  // place holder to enable table lookup
169             case 0x015B: return true;  // place holder to enable table lookup
170             case 0x015C: return true;  // place holder to enable table lookup
171             case 0x015D: return true;  // place holder to enable table lookup
172             case 0x015E: return true;  // place holder to enable table lookup
173             case 0x015F: return true;  // place holder to enable table lookup
174             case 0x0160: return false; // LATIN CAPITAL LETTER S WITH CARON
175             case 0x0161: return false; // LATIN SMALL LETTER S WITH CARON
176             case 0x0162: return true;  // place holder to enable table lookup
177             case 0x0163: return true;  // place holder to enable table lookup
178             case 0x0164: return true;  // place holder to enable table lookup
179             case 0x0165: return true;  // place holder to enable table lookup
180             case 0x0166: return true;  // place holder to enable table lookup
181             case 0x0167: return true;  // place holder to enable table lookup
182             case 0x0168: return true;  // place holder to enable table lookup
183             case 0x0169: return true;  // place holder to enable table lookup
184             case 0x016A: return true;  // place holder to enable table lookup
185             case 0x016B: return true;  // place holder to enable table lookup
186             case 0x016C: return true;  // place holder to enable table lookup
187             case 0x016D: return true;  // place holder to enable table lookup
188             case 0x016E: return true;  // place holder to enable table lookup
189             case 0x016F: return true;  // place holder to enable table lookup
190             case 0x0170: return true;  // place holder to enable table lookup
191             case 0x0171: return true;  // place holder to enable table lookup
192             case 0x0172: return true;  // place holder to enable table lookup
193             case 0x0173: return true;  // place holder to enable table lookup
194             case 0x0174: return true;  // place holder to enable table lookup
195             case 0x0175: return true;  // place holder to enable table lookup
196             case 0x0176: return true;  // place holder to enable table lookup
197             case 0x0177: return true;  // place holder to enable table lookup
198             case 0x0178: return false; // LATIN CAPITAL LETTER Y WITH DIAERESIS
199             case 0x017D: return false; // LATIN CAPITAL LETTER Z WITH CARON
200             case 0x017E: return false; // LATIN SMALL LETTER Z WITH CARON
201         }
202         
203         return true;
204         
205     }
206 
207 }
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