pdfencodings.java

来自「处理PDF」· Java 代码 · 共 798 行 · 第 1/3 页

        synchronized (extraEncodings) { // This serializes concurrent updates
            HashMap newEncodings = (HashMap)extraEncodings.clone();
            newEncodings.put(name.toLowerCase(), enc);
            extraEncodings = newEncodings;  // This swap does not require synchronization with reader
        }
    }
    
    private static class WingdingsConversion implements ExtraEncoding {
        
        public byte[] charToByte(char char1, String encoding) {
            if (char1 == ' ')
                return new byte[]{(byte)char1};
            else if (char1 >= '\u2701' && char1 <= '\u27BE') {
                byte v = table[char1 - 0x2700];
                if (v != 0)
                    return new byte[]{v};
            }
            return new byte[0];
        }
        
        public byte[] charToByte(String text, String encoding) {
            char cc[] = text.toCharArray();
            byte b[] = new byte[cc.length];
            int ptr = 0;
            int len = cc.length;
            for (int k = 0; k < len; ++k) {
                char c = cc[k];
                if (c == ' ')
                    b[ptr++] = (byte)c;
                else if (c >= '\u2701' && c <= '\u27BE') {
                    byte v = table[c - 0x2700];
                    if (v != 0)
                        b[ptr++] = v;
                }
            }
            if (ptr == len)
                return b;
            byte b2[] = new byte[ptr];
            System.arraycopy(b, 0, b2, 0, ptr);
            return b2;
        }
        
        public String byteToChar(byte[] b, String encoding) {
            return null;
        }

        private final static byte table[] = {
            0, 35, 34, 0, 0, 0, 41, 62, 81, 42, 
            0, 0, 65, 63, 0, 0, 0, 0, 0, -4, 
            0, 0, 0, -5, 0, 0, 0, 0, 0, 0, 
            86, 0, 88, 89, 0, 0, 0, 0, 0, 0, 
            0, 0, -75, 0, 0, 0, 0, 0, -74, 0, 
            0, 0, -83, -81, -84, 0, 0, 0, 0, 0, 
            0, 0, 0, 124, 123, 0, 0, 0, 84, 0, 
            0, 0, 0, 0, 0, 0, 0, -90, 0, 0, 
            0, 113, 114, 0, 0, 0, 117, 0, 0, 0, 
            0, 0, 0, 125, 126, 0, 0, 0, 0, 0, 
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
            0, 0, 0, 0, 0, 0, 0, 0, -116, -115, 
            -114, -113, -112, -111, -110, -109, -108, -107, -127, -126, 
            -125, -124, -123, -122, -121, -120, -119, -118, -116, -115, 
            -114, -113, -112, -111, -110, -109, -108, -107, -24, 0, 
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
            0, -24, -40, 0, 0, -60, -58, 0, 0, -16, 
            0, 0, 0, 0, 0, 0, 0, 0, 0, -36, 
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
            0
        };
    }

    private static class Cp437Conversion implements ExtraEncoding {
        private static IntHashtable c2b = new IntHashtable();
        
        public byte[] charToByte(String text, String encoding) {
            char cc[] = text.toCharArray();
            byte b[] = new byte[cc.length];
            int ptr = 0;
            int len = cc.length;
            for (int k = 0; k < len; ++k) {
                char c = cc[k];
                if (c < 128)
                    b[ptr++] = (byte)c;
                else {
                    byte v = (byte)c2b.get(c);
                    if (v != 0)
                        b[ptr++] = v;
                }
            }
            if (ptr == len)
                return b;
            byte b2[] = new byte[ptr];
            System.arraycopy(b, 0, b2, 0, ptr);
            return b2;
        }
        
        public byte[] charToByte(char char1, String encoding) {
            if (char1 < 128)
                return new byte[]{(byte)char1};
            else {
                byte v = (byte)c2b.get(char1);
                if (v != 0)
                    return new byte[]{v};
                else
                    return new byte[0];
            }
        }
        
        public String byteToChar(byte[] b, String encoding) {
            int len = b.length;
            char cc[] = new char[len];
            int ptr = 0;
            for (int k = 0; k < len; ++k) {
                int c = b[k] & 0xff;
                if (c < ' ')
                    continue;
                if (c < 128)
                    cc[ptr++] = (char)c;
                else {
                    char v = table[c - 128];
                    cc[ptr++] = v;
                }
            }
            return new String(cc, 0, ptr);
        }
        
        private final static char table[] = {
            '\u00C7', '\u00FC', '\u00E9', '\u00E2', '\u00E4', '\u00E0', '\u00E5', '\u00E7', '\u00EA', '\u00EB', '\u00E8', '\u00EF', '\u00EE', '\u00EC', '\u00C4', '\u00C5',
            '\u00C9', '\u00E6', '\u00C6', '\u00F4', '\u00F6', '\u00F2', '\u00FB', '\u00F9', '\u00FF', '\u00D6', '\u00DC', '\u00A2', '\u00A3', '\u00A5', '\u20A7', '\u0192',
            '\u00E1', '\u00ED', '\u00F3', '\u00FA', '\u00F1', '\u00D1', '\u00AA', '\u00BA', '\u00BF', '\u2310', '\u00AC', '\u00BD', '\u00BC', '\u00A1', '\u00AB', '\u00BB',
            '\u2591', '\u2592', '\u2593', '\u2502', '\u2524', '\u2561', '\u2562', '\u2556', '\u2555', '\u2563', '\u2551', '\u2557', '\u255D', '\u255C', '\u255B', '\u2510',
            '\u2514', '\u2534', '\u252C', '\u251C', '\u2500', '\u253C', '\u255E', '\u255F', '\u255A', '\u2554', '\u2569', '\u2566', '\u2560', '\u2550', '\u256C', '\u2567',
            '\u2568', '\u2564', '\u2565', '\u2559', '\u2558', '\u2552', '\u2553', '\u256B', '\u256A', '\u2518', '\u250C', '\u2588', '\u2584', '\u258C', '\u2590', '\u2580',
            '\u03B1', '\u00DF', '\u0393', '\u03C0', '\u03A3', '\u03C3', '\u00B5', '\u03C4', '\u03A6', '\u0398', '\u03A9', '\u03B4', '\u221E', '\u03C6', '\u03B5', '\u2229',
            '\u2261', '\u00B1', '\u2265', '\u2264', '\u2320', '\u2321', '\u00F7', '\u2248', '\u00B0', '\u2219', '\u00B7', '\u221A', '\u207F', '\u00B2', '\u25A0', '\u00A0'
        };
        
        static {
            for (int k = 0; k < table.length; ++k)
                c2b.put(table[k], k + 128);
        }
    }
    
    private static class SymbolConversion implements ExtraEncoding {
        
        private static final IntHashtable t1 = new IntHashtable();
        private static final IntHashtable t2 = new IntHashtable();
        private IntHashtable translation;
        
        SymbolConversion(boolean symbol) {
            if (symbol)
                translation = t1;
            else
                translation = t2;
        }
        
        public byte[] charToByte(String text, String encoding) {
            char cc[] = text.toCharArray();
            byte b[] = new byte[cc.length];
            int ptr = 0;
            int len = cc.length;
            for (int k = 0; k < len; ++k) {
                char c = cc[k];
                byte v = (byte)translation.get(c);
                if (v != 0)
                    b[ptr++] = v;
            }
            if (ptr == len)
                return b;
            byte b2[] = new byte[ptr];
            System.arraycopy(b, 0, b2, 0, ptr);
            return b2;
        }
        
        public byte[] charToByte(char char1, String encoding) {
            byte v = (byte)translation.get(char1);
            if (v != 0)
                return new byte[]{v};
            else
                return new byte[0];
        }
        
        public String byteToChar(byte[] b, String encoding) {
            return null;
        }

        private final static char table1[] = {
            ' ','!','\u2200','#','\u2203','%','&','\u220b','(',')','*','+',',','-','.','/',
            '0','1','2','3','4','5','6','7','8','9',':',';','<','=','>','?',
            '\u2245','\u0391','\u0392','\u03a7','\u0394','\u0395','\u03a6','\u0393','\u0397','\u0399','\u03d1','\u039a','\u039b','\u039c','\u039d','\u039f',
            '\u03a0','\u0398','\u03a1','\u03a3','\u03a4','\u03a5','\u03c2','\u03a9','\u039e','\u03a8','\u0396','[','\u2234',']','\u22a5','_',
            '\u0305','\u03b1','\u03b2','\u03c7','\u03b4','\u03b5','\u03d5','\u03b3','\u03b7','\u03b9','\u03c6','\u03ba','\u03bb','\u03bc','\u03bd','\u03bf',
            '\u03c0','\u03b8','\u03c1','\u03c3','\u03c4','\u03c5','\u03d6','\u03c9','\u03be','\u03c8','\u03b6','{','|','}','~','\0',
            '\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0',
            '\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0',
            '\u20ac','\u03d2','\u2032','\u2264','\u2044','\u221e','\u0192','\u2663','\u2666','\u2665','\u2660','\u2194','\u2190','\u2191','\u2192','\u2193',
            '\u00b0','\u00b1','\u2033','\u2265','\u00d7','\u221d','\u2202','\u2022','\u00f7','\u2260','\u2261','\u2248','\u2026','\u2502','\u2500','\u21b5',
            '\u2135','\u2111','\u211c','\u2118','\u2297','\u2295','\u2205','\u2229','\u222a','\u2283','\u2287','\u2284','\u2282','\u2286','\u2208','\u2209',
            '\u2220','\u2207','\u00ae','\u00a9','\u2122','\u220f','\u221a','\u2022','\u00ac','\u2227','\u2228','\u21d4','\u21d0','\u21d1','\u21d2','\u21d3',
            '\u25ca','\u2329','\0','\0','\0','\u2211','\u239b','\u239c','\u239d','\u23a1','\u23a2','\u23a3','\u23a7','\u23a8','\u23a9','\u23aa',
            '\0','\u232a','\u222b','\u2320','\u23ae','\u2321','\u239e','\u239f','\u23a0','\u23a4','\u23a5','\u23a6','\u23ab','\u23ac','\u23ad','\0'
        };

        private final static char table2[] = {
            '\u0020','\u2701','\u2702','\u2703','\u2704','\u260e','\u2706','\u2707','\u2708','\u2709','\u261b','\u261e','\u270C','\u270D','\u270E','\u270F',
            '\u2710','\u2711','\u2712','\u2713','\u2714','\u2715','\u2716','\u2717','\u2718','\u2719','\u271A','\u271B','\u271C','\u271D','\u271E','\u271F',
            '\u2720','\u2721','\u2722','\u2723','\u2724','\u2725','\u2726','\u2727','\u2605','\u2729','\u272A','\u272B','\u272C','\u272D','\u272E','\u272F',
            '\u2730','\u2731','\u2732','\u2733','\u2734','\u2735','\u2736','\u2737','\u2738','\u2739','\u273A','\u273B','\u273C','\u273D','\u273E','\u273F',
            '\u2740','\u2741','\u2742','\u2743','\u2744','\u2745','\u2746','\u2747','\u2748','\u2749','\u274A','\u274B','\u25cf','\u274D','\u25a0','\u274F',
            '\u2750','\u2751','\u2752','\u25b2','\u25bc','\u25c6','\u2756','\u25d7','\u2758','\u2759','\u275A','\u275B','\u275C','\u275D','\u275E','\u0000',
            '\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0',
            '\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0',
            '\u0000','\u2761','\u2762','\u2763','\u2764','\u2765','\u2766','\u2767','\u2663','\u2666','\u2665','\u2660','\u2460','\u2461','\u2462','\u2463',
            '\u2464','\u2465','\u2466','\u2467','\u2468','\u2469','\u2776','\u2777','\u2778','\u2779','\u277A','\u277B','\u277C','\u277D','\u277E','\u277F',
            '\u2780','\u2781','\u2782','\u2783','\u2784','\u2785','\u2786','\u2787','\u2788','\u2789','\u278A','\u278B','\u278C','\u278D','\u278E','\u278F',
            '\u2790','\u2791','\u2792','\u2793','\u2794','\u2192','\u2194','\u2195','\u2798','\u2799','\u279A','\u279B','\u279C','\u279D','\u279E','\u279F',
            '\u27A0','\u27A1','\u27A2','\u27A3','\u27A4','\u27A5','\u27A6','\u27A7','\u27A8','\u27A9','\u27AA','\u27AB','\u27AC','\u27AD','\u27AE','\u27AF',
            '\u0000','\u27B1','\u27B2','\u27B3','\u27B4','\u27B5','\u27B6','\u27B7','\u27B8','\u27B9','\u27BA','\u27BB','\u27BC','\u27BD','\u27BE','\u0000'
        };

        static {
            for (int k = 0; k < table1.length; ++k) {
                int v = table1[k];
                if (v != 0)
                    t1.put(v, k + 32);
            }
            for (int k = 0; k < table2.length; ++k) {
                int v = table2[k];
                if (v != 0)
                    t2.put(v, k + 32);
            }
        }
    }
    
    private static class SymbolTTConversion implements ExtraEncoding {
        
        public byte[] charToByte(char char1, String encoding) {
            if ((char1 & 0xff00) == 0 || (char1 & 0xff00) == 0xf000)
                return new byte[]{(byte)char1};
            else
                return new byte[0];
        }
        
        public byte[] charToByte(String text, String encoding) {
            char ch[] = text.toCharArray();
            byte b[] = new byte[ch.length];
            int ptr = 0;
            int len = ch.length;
            for (int k = 0; k < len; ++k) {
                char c = ch[k];
                if ((c & 0xff00) == 0 || (c & 0xff00) == 0xf000)
                    b[ptr++] = (byte)c;
            }
            if (ptr == len)
                return b;
            byte b2[] = new byte[ptr];
            System.arraycopy(b, 0, b2, 0, ptr);
            return b2;
        }
        
        public String byteToChar(byte[] b, String encoding) {
            return null;
        }
        
    }
}