1 /* |
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2 * Copyright (c) 1996, 2005, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package sun.awt.motif; |
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27 |
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28 import java.nio.ByteBuffer; |
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29 import java.nio.CharBuffer; |
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30 import java.nio.charset.*; |
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31 |
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32 public class X11Dingbats extends Charset { |
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33 public X11Dingbats () { |
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34 super("X11Dingbats", null); |
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35 } |
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36 |
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37 public CharsetEncoder newEncoder() { |
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38 return new Encoder(this); |
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39 } |
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40 |
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41 /* Seems like supporting a decoder is required, but we aren't going |
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42 * to be publically exposing this class, so no need to waste work |
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43 */ |
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44 public CharsetDecoder newDecoder() { |
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45 throw new Error("Decoder is not supported by X11Dingbats Charset"); |
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46 } |
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47 |
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48 public boolean contains(Charset cs) { |
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49 return cs instanceof X11Dingbats; |
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50 } |
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51 |
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52 private static class Encoder extends CharsetEncoder { |
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53 public Encoder(Charset cs) { |
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54 super(cs, 1.0f, 1.0f); |
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55 } |
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56 |
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57 public boolean canEncode(char ch) { |
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58 if (ch >= 0x2701 && ch <= 0x275e) { // direct map |
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59 return true; |
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60 } |
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61 if (ch >= 0x2761 && ch <= 0x27be) { |
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62 return (table[ch - 0x2761] != 0x00); |
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63 } |
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64 return false; |
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65 } |
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66 |
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67 protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) { |
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68 char[] sa = src.array(); |
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69 int sp = src.arrayOffset() + src.position(); |
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70 int sl = src.arrayOffset() + src.limit(); |
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71 assert (sp <= sl); |
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72 sp = (sp <= sl ? sp : sl); |
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73 byte[] da = dst.array(); |
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74 int dp = dst.arrayOffset() + dst.position(); |
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75 int dl = dst.arrayOffset() + dst.limit(); |
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76 assert (dp <= dl); |
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77 dp = (dp <= dl ? dp : dl); |
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78 |
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79 try { |
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80 while (sp < sl) { |
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81 char c = sa[sp]; |
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82 if (dl - dp < 1) |
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83 return CoderResult.OVERFLOW; |
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84 |
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85 if (!canEncode(c)) |
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86 return CoderResult.unmappableForLength(1); |
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87 sp++; |
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88 if (c >= 0x2761){ |
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89 da[dp++] = table[c - 0x2761]; // table lookup |
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90 } else { |
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91 da[dp++] = (byte)(c + 0x20 - 0x2700); // direct map |
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92 } |
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93 } |
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94 return CoderResult.UNDERFLOW; |
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95 } finally { |
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96 src.position(sp - src.arrayOffset()); |
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97 dst.position(dp - dst.arrayOffset()); |
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98 } |
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99 } |
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100 |
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101 private static byte[] table = { |
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102 (byte)0xa1, (byte)0xa2, (byte)0xa3, (byte)0xa4, |
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103 (byte)0xa5, (byte)0xa6, (byte)0xa7, |
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104 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
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105 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
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106 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
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107 (byte)0x00, (byte)0x00, (byte)0xb6, (byte)0xb7, |
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108 (byte)0xb8, (byte)0xb9, (byte)0xba, (byte)0xbb, |
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109 (byte)0xbc, (byte)0xbd, (byte)0xbe, (byte)0xbf, |
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110 (byte)0xc0, (byte)0xc1, (byte)0xc2, (byte)0xc3, |
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111 (byte)0xc4, (byte)0xc5, (byte)0xc6, (byte)0xc7, |
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112 (byte)0xc8, (byte)0xc9, (byte)0xca, (byte)0xcb, |
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113 (byte)0xcc, (byte)0xcd, (byte)0xce, (byte)0xcf, |
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114 (byte)0xd0, (byte)0xd1, (byte)0xd2, (byte)0xd3, |
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115 (byte)0xd4, (byte)0x00, (byte)0x00, (byte)0x00, |
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116 (byte)0xd8, (byte)0xd9, (byte)0xda, (byte)0xdb, |
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117 (byte)0xdc, (byte)0xdd, (byte)0xde, (byte)0x00, |
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118 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
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119 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
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120 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
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121 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
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122 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
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123 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
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124 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
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125 (byte)0x00, (byte)0x00, (byte)0x00}; |
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126 |
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127 /* The default implementation creates a decoder and we don't have one */ |
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128 public boolean isLegalReplacement(byte[] repl) { |
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129 return true; |
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130 } |
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131 } |
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132 } |
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