Source Code Cross Referenced for StreamInImpl.java in  » IDE-Netbeans » visualweb.api.designer » org » w3c » tidy » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Netbeans » visualweb.api.designer » org.w3c.tidy 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * @(#)StreamInImpl.java   1.11 2000/08/16
003:         *
004:         */
005:
006:        package org.w3c.tidy;
007:
008:        /**
009:         *
010:         * Input Stream Implementation
011:         *
012:         * (c) 1998-2000 (W3C) MIT, INRIA, Keio University
013:         * Derived from <a href="http://www.w3.org/People/Raggett/tidy">
014:         * HTML Tidy Release 4 Aug 2000</a>
015:         *
016:         * @author  Dave Raggett <dsr@w3.org>
017:         * @author  Andy Quick <ac.quick@sympatico.ca> (translation to Java)
018:         * @version 1.0, 1999/05/22
019:         * @version 1.0.1, 1999/05/29
020:         * @version 1.1, 1999/06/18 Java Bean
021:         * @version 1.2, 1999/07/10 Tidy Release 7 Jul 1999
022:         * @version 1.3, 1999/07/30 Tidy Release 26 Jul 1999
023:         * @version 1.4, 1999/09/04 DOM support
024:         * @version 1.5, 1999/10/23 Tidy Release 27 Sep 1999
025:         * @version 1.6, 1999/11/01 Tidy Release 22 Oct 1999
026:         * @version 1.7, 1999/12/06 Tidy Release 30 Nov 1999
027:         * @version 1.8, 2000/01/22 Tidy Release 13 Jan 2000
028:         * @version 1.9, 2000/06/03 Tidy Release 30 Apr 2000
029:         * @version 1.10, 2000/07/22 Tidy Release 8 Jul 2000
030:         * @version 1.11, 2000/08/16 Tidy Release 4 Aug 2000
031:         */
032:
033:        import java.io.InputStream;
034:        import java.io.IOException;
035:
036:        public class StreamInImpl extends StreamIn {
037:
038:            /* Mapping for Windows Western character set (128-159) to Unicode */
039:            private static int[] Win2Unicode = { 0x20AC, 0x0000, 0x201A,
040:                    0x0192, 0x201E, 0x2026, 0x2020, 0x2021, 0x02C6, 0x2030,
041:                    0x0160, 0x2039, 0x0152, 0x0000, 0x017D, 0x0000, 0x0000,
042:                    0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
043:                    0x02DC, 0x2122, 0x0161, 0x203A, 0x0153, 0x0000, 0x017E,
044:                    0x0178 };
045:
046:            /*
047:            John Love-Jensen contributed this table for mapping MacRoman
048:            character set to Unicode
049:             */
050:
051:            private static int[] Mac2Unicode = {
052:
053:            0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
054:                    0x0008, 0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x000E,
055:                    0x000F,
056:
057:                    0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016,
058:                    0x0017, 0x0018, 0x0019, 0x001A, 0x001B, 0x001C, 0x001D,
059:                    0x001E, 0x001F,
060:
061:                    0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026,
062:                    0x0027, 0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D,
063:                    0x002E, 0x002F,
064:
065:                    0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036,
066:                    0x0037, 0x0038, 0x0039, 0x003A, 0x003B, 0x003C, 0x003D,
067:                    0x003E, 0x003F,
068:
069:                    0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046,
070:                    0x0047, 0x0048, 0x0049, 0x004A, 0x004B, 0x004C, 0x004D,
071:                    0x004E, 0x004F,
072:
073:                    0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,
074:                    0x0057, 0x0058, 0x0059, 0x005A, 0x005B, 0x005C, 0x005D,
075:                    0x005E, 0x005F,
076:
077:                    0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066,
078:                    0x0067, 0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D,
079:                    0x006E, 0x006F,
080:
081:                    0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076,
082:                    0x0077, 0x0078, 0x0079, 0x007A, 0x007B, 0x007C, 0x007D,
083:                    0x007E, 0x007F,
084:                    /* x7F = DEL */
085:                    0x00C4, 0x00C5, 0x00C7, 0x00C9, 0x00D1, 0x00D6, 0x00DC,
086:                    0x00E1, 0x00E0, 0x00E2, 0x00E4, 0x00E3, 0x00E5, 0x00E7,
087:                    0x00E9, 0x00E8,
088:
089:                    0x00EA, 0x00EB, 0x00ED, 0x00EC, 0x00EE, 0x00EF, 0x00F1,
090:                    0x00F3, 0x00F2, 0x00F4, 0x00F6, 0x00F5, 0x00FA, 0x00F9,
091:                    0x00FB, 0x00FC,
092:
093:                    0x2020, 0x00B0, 0x00A2, 0x00A3, 0x00A7, 0x2022, 0x00B6,
094:                    0x00DF, 0x00AE, 0x00A9, 0x2122, 0x00B4, 0x00A8, 0x2260,
095:                    0x00C6, 0x00D8,
096:
097:                    0x221E, 0x00B1, 0x2264, 0x2265, 0x00A5, 0x00B5, 0x2202,
098:                    0x2211, 0x220F, 0x03C0, 0x222B, 0x00AA, 0x00BA, 0x03A9,
099:                    0x00E6, 0x00F8,
100:
101:                    0x00BF, 0x00A1, 0x00AC, 0x221A, 0x0192, 0x2248, 0x2206,
102:                    0x00AB, 0x00BB, 0x2026, 0x00A0, 0x00C0, 0x00C3, 0x00D5,
103:                    0x0152, 0x0153,
104:
105:                    0x2013, 0x2014, 0x201C, 0x201D, 0x2018, 0x2019, 0x00F7,
106:                    0x25CA, 0x00FF, 0x0178, 0x2044, 0x20AC, 0x2039, 0x203A,
107:                    0xFB01, 0xFB02,
108:
109:                    0x2021, 0x00B7, 0x201A, 0x201E, 0x2030, 0x00C2, 0x00CA,
110:                    0x00C1, 0x00CB, 0x00C8, 0x00CD, 0x00CE, 0x00CF, 0x00CC,
111:                    0x00D3, 0x00D4,
112:                    /* xF0 = Apple Logo */
113:                    0xF8FF, 0x00D2, 0x00DA, 0x00DB, 0x00D9, 0x0131, 0x02C6,
114:                    0x02DC, 0x00AF, 0x02D8, 0x02D9, 0x02DA, 0x00B8, 0x02DD,
115:                    0x02DB, 0x02C7 };
116:
117:            public StreamInImpl(InputStream stream, int encoding, int tabsize) {
118:                this .stream = stream;
119:                this .pushed = false;
120:                this .c = (int) '\0';
121:                this .tabs = 0;
122:                this .tabsize = tabsize;
123:                this .curline = 1;
124:                this .curcol = 1;
125:                this .encoding = encoding;
126:                this .state = FSM_ASCII;
127:                this .endOfStream = false;
128:            }
129:
130:            /* read char from stream */
131:            public int readCharFromStream() {
132:                int n, c, i, count;
133:
134:                try {
135:                    c = this .stream.read();
136:
137:                    if (c == EndOfStream) {
138:                        this .endOfStream = true;
139:                        return c;
140:                    }
141:
142:                    /*
143:                       A document in ISO-2022 based encoding uses some ESC sequences
144:                       called "designator" to switch character sets. The designators
145:                       defined and used in ISO-2022-JP are:
146:
147:                        "ESC" + "(" + ?     for ISO646 variants
148:
149:                        "ESC" + "$" + ?     and
150:                        "ESC" + "$" + "(" + ?   for multibyte character sets
151:
152:                       Where ? stands for a single character used to indicate the
153:                       character set for multibyte characters.
154:
155:                       Tidy handles this by preserving the escape sequence and
156:                       setting the top bit of each byte for non-ascii chars. This
157:                       bit is then cleared on output. The input stream keeps track
158:                       of the state to determine when to set/clear the bit.
159:                     */
160:
161:                    if (this .encoding == Configuration.ISO2022) {
162:                        if (c == 0x1b) /* ESC */
163:                        {
164:                            this .state = FSM_ESC;
165:                            return c;
166:                        }
167:
168:                        switch (this .state) {
169:                        case FSM_ESC:
170:                            if (c == '$')
171:                                this .state = FSM_ESCD;
172:                            else if (c == '(')
173:                                this .state = FSM_ESCP;
174:                            else
175:                                this .state = FSM_ASCII;
176:                            break;
177:
178:                        case FSM_ESCD:
179:                            if (c == '(')
180:                                this .state = FSM_ESCDP;
181:                            else
182:                                this .state = FSM_NONASCII;
183:                            break;
184:
185:                        case FSM_ESCDP:
186:                            this .state = FSM_NONASCII;
187:                            break;
188:
189:                        case FSM_ESCP:
190:                            this .state = FSM_ASCII;
191:                            break;
192:
193:                        case FSM_NONASCII:
194:                            c |= 0x80;
195:                            break;
196:                        }
197:
198:                        return c;
199:                    }
200:
201:                    if (this .encoding != Configuration.UTF8)
202:                        return c;
203:
204:                    /* deal with UTF-8 encoded char */
205:
206:                    if ((c & 0xE0) == 0xC0) /* 110X XXXX  two bytes */
207:                    {
208:                        n = c & 31;
209:                        count = 1;
210:                    } else if ((c & 0xF0) == 0xE0) /* 1110 XXXX  three bytes */
211:                    {
212:                        n = c & 15;
213:                        count = 2;
214:                    } else if ((c & 0xF8) == 0xF0) /* 1111 0XXX  four bytes */
215:                    {
216:                        n = c & 7;
217:                        count = 3;
218:                    } else if ((c & 0xFC) == 0xF8) /* 1111 10XX  five bytes */
219:                    {
220:                        n = c & 3;
221:                        count = 4;
222:                    } else if ((c & 0xFE) == 0xFC) /* 1111 110X  six bytes */
223:                    {
224:                        n = c & 1;
225:                        count = 5;
226:                    } else
227:                        /* 0XXX XXXX one byte */
228:                        return c;
229:
230:                    /* successor bytes should have the form 10XX XXXX */
231:                    for (i = 1; i <= count; ++i) {
232:                        c = this .stream.read();
233:
234:                        if (c == EndOfStream) {
235:                            this .endOfStream = true;
236:                            return c;
237:                        }
238:
239:                        n = (n << 6) | (c & 0x3F);
240:                    }
241:                } catch (IOException e) {
242:                    System.err.println("StreamInImpl.readCharFromStream: "
243:                            + e.toString());
244:                    n = EndOfStream;
245:                }
246:
247:                return n;
248:            }
249:
250:            public int readChar() {
251:                int c;
252:
253:                if (this .pushed) {
254:                    this .pushed = false;
255:                    c = this .c;
256:
257:                    if (c == '\n') {
258:                        this .curcol = 1;
259:                        this .curline++;
260:                        return c;
261:                    }
262:
263:                    this .curcol++;
264:                    return c;
265:                }
266:
267:                this .lastcol = this .curcol;
268:
269:                if (this .tabs > 0) {
270:                    this .curcol++;
271:                    this .tabs--;
272:                    return ' ';
273:                }
274:
275:                for (;;) {
276:                    c = readCharFromStream();
277:
278:                    if (c < 0)
279:                        return EndOfStream;
280:
281:                    if (c == '\n') {
282:                        this .curcol = 1;
283:                        this .curline++;
284:                        break;
285:                    }
286:
287:                    if (c == '\r') {
288:                        c = readCharFromStream();
289:                        if (c != '\n') {
290:                            ungetChar(c);
291:                            c = '\n';
292:                        }
293:                        this .curcol = 1;
294:                        this .curline++;
295:                        break;
296:                    }
297:
298:                    if (c == '\t') {
299:                        this .tabs = this .tabsize
300:                                - ((this .curcol - 1) % this .tabsize) - 1;
301:                        this .curcol++;
302:                        c = ' ';
303:                        break;
304:                    }
305:
306:                    /* strip control characters, except for Esc */
307:
308:                    if (c == '\033')
309:                        break;
310:
311:                    if (0 < c && c < 32)
312:                        continue;
313:
314:                    /* watch out for IS02022 */
315:
316:                    if (this .encoding == Configuration.RAW
317:                            || this .encoding == Configuration.ISO2022) {
318:                        this .curcol++;
319:                        break;
320:                    }
321:
322:                    if (this .encoding == Configuration.MACROMAN)
323:                        c = Mac2Unicode[c];
324:
325:                    /* produced e.g. as a side-effect of smart quotes in Word */
326:
327:                    if (127 < c && c < 160) {
328:                        Report.encodingError((Lexer) this .lexer,
329:                                Report.WINDOWS_CHARS, c);
330:
331:                        c = Win2Unicode[c - 128];
332:
333:                        if (c == 0)
334:                            continue;
335:                    }
336:
337:                    this .curcol++;
338:                    break;
339:                }
340:
341:                return c;
342:            }
343:
344:            public void ungetChar(int c) {
345:                this .pushed = true;
346:                this .c = c;
347:
348:                if (c == '\n') {
349:                    --this .curline;
350:                }
351:
352:                this .curcol = this .lastcol;
353:            }
354:
355:            public boolean isEndOfStream() {
356:                return this.endOfStream;
357:            }
358:
359:        }
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