J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996-2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt.motif; |
| 27 | |
| 28 | import java.nio.ByteBuffer; |
| 29 | import java.nio.CharBuffer; |
| 30 | import java.nio.charset.*; |
| 31 | |
| 32 | public class X11Dingbats extends Charset { |
| 33 | public X11Dingbats () { |
| 34 | super("X11Dingbats", null); |
| 35 | } |
| 36 | |
| 37 | public CharsetEncoder newEncoder() { |
| 38 | return new Encoder(this); |
| 39 | } |
| 40 | |
| 41 | /* Seems like supporting a decoder is required, but we aren't going |
| 42 | * to be publically exposing this class, so no need to waste work |
| 43 | */ |
| 44 | public CharsetDecoder newDecoder() { |
| 45 | throw new Error("Decoder is not supported by X11Dingbats Charset"); |
| 46 | } |
| 47 | |
| 48 | public boolean contains(Charset cs) { |
| 49 | return cs instanceof X11Dingbats; |
| 50 | } |
| 51 | |
| 52 | private static class Encoder extends CharsetEncoder { |
| 53 | public Encoder(Charset cs) { |
| 54 | super(cs, 1.0f, 1.0f); |
| 55 | } |
| 56 | |
| 57 | public boolean canEncode(char ch) { |
| 58 | if (ch >= 0x2701 && ch <= 0x275e) { // direct map |
| 59 | return true; |
| 60 | } |
| 61 | if (ch >= 0x2761 && ch <= 0x27be) { |
| 62 | return (table[ch - 0x2761] != 0x00); |
| 63 | } |
| 64 | return false; |
| 65 | } |
| 66 | |
| 67 | protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) { |
| 68 | char[] sa = src.array(); |
| 69 | int sp = src.arrayOffset() + src.position(); |
| 70 | int sl = src.arrayOffset() + src.limit(); |
| 71 | assert (sp <= sl); |
| 72 | sp = (sp <= sl ? sp : sl); |
| 73 | byte[] da = dst.array(); |
| 74 | int dp = dst.arrayOffset() + dst.position(); |
| 75 | int dl = dst.arrayOffset() + dst.limit(); |
| 76 | assert (dp <= dl); |
| 77 | dp = (dp <= dl ? dp : dl); |
| 78 | |
| 79 | try { |
| 80 | while (sp < sl) { |
| 81 | char c = sa[sp]; |
| 82 | if (dl - dp < 1) |
| 83 | return CoderResult.OVERFLOW; |
| 84 | |
| 85 | if (!canEncode(c)) |
| 86 | return CoderResult.unmappableForLength(1); |
| 87 | sp++; |
| 88 | if (c >= 0x2761){ |
| 89 | da[dp++] = table[c - 0x2761]; // table lookup |
| 90 | } else { |
| 91 | da[dp++] = (byte)(c + 0x20 - 0x2700); // direct map |
| 92 | } |
| 93 | } |
| 94 | return CoderResult.UNDERFLOW; |
| 95 | } finally { |
| 96 | src.position(sp - src.arrayOffset()); |
| 97 | dst.position(dp - dst.arrayOffset()); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | private static byte[] table = { |
| 102 | (byte)0xa1, (byte)0xa2, (byte)0xa3, (byte)0xa4, |
| 103 | (byte)0xa5, (byte)0xa6, (byte)0xa7, |
| 104 | (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
| 105 | (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
| 106 | (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
| 107 | (byte)0x00, (byte)0x00, (byte)0xb6, (byte)0xb7, |
| 108 | (byte)0xb8, (byte)0xb9, (byte)0xba, (byte)0xbb, |
| 109 | (byte)0xbc, (byte)0xbd, (byte)0xbe, (byte)0xbf, |
| 110 | (byte)0xc0, (byte)0xc1, (byte)0xc2, (byte)0xc3, |
| 111 | (byte)0xc4, (byte)0xc5, (byte)0xc6, (byte)0xc7, |
| 112 | (byte)0xc8, (byte)0xc9, (byte)0xca, (byte)0xcb, |
| 113 | (byte)0xcc, (byte)0xcd, (byte)0xce, (byte)0xcf, |
| 114 | (byte)0xd0, (byte)0xd1, (byte)0xd2, (byte)0xd3, |
| 115 | (byte)0xd4, (byte)0x00, (byte)0x00, (byte)0x00, |
| 116 | (byte)0xd8, (byte)0xd9, (byte)0xda, (byte)0xdb, |
| 117 | (byte)0xdc, (byte)0xdd, (byte)0xde, (byte)0x00, |
| 118 | (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
| 119 | (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
| 120 | (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
| 121 | (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
| 122 | (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
| 123 | (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
| 124 | (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
| 125 | (byte)0x00, (byte)0x00, (byte)0x00}; |
| 126 | |
| 127 | /* The default implementation creates a decoder and we don't have one */ |
| 128 | public boolean isLegalReplacement(byte[] repl) { |
| 129 | return true; |
| 130 | } |
| 131 | } |
| 132 | } |