Showing the changes to java/pkg/javax/swing/text/html/parser/Parser.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,2315 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2010, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package javax.swing.text.html.parser; | ||
| 27 | |||
| 28 | import javax.swing.text.SimpleAttributeSet; | ||
| 29 | import javax.swing.text.html.HTML; | ||
| 30 | import javax.swing.text.ChangedCharSetException; | ||
| 31 | import java.io.*; | ||
| 32 | import java.util.Hashtable; | ||
| 33 | import java.util.Properties; | ||
| 34 | import java.util.Vector; | ||
| 35 | import java.util.Enumeration; | ||
| 36 | import java.net.URL; | ||
| 37 | |||
| 38 | import sun.misc.MessageUtils; | ||
| 39 | |||
| 40 | /** | ||
| 41 | * A simple DTD-driven HTML parser. The parser reads an | ||
| 42 | * HTML file from an InputStream and calls various methods | ||
| 43 | * (which should be overridden in a subclass) when tags and | ||
| 44 | * data are encountered. | ||
| 45 | * <p> | ||
| 46 | * Unfortunately there are many badly implemented HTML parsers | ||
| 47 | * out there, and as a result there are many badly formatted | ||
| 48 | * HTML files. This parser attempts to parse most HTML files. | ||
| 49 | * This means that the implementation sometimes deviates from | ||
| 50 | * the SGML specification in favor of HTML. | ||
| 51 | * <p> | ||
| 52 | * The parser treats \r and \r\n as \n. Newlines after starttags | ||
| 53 | * and before end tags are ignored just as specified in the SGML/HTML | ||
| 54 | * specification. | ||
| 55 | * <p> | ||
| 56 | * The html spec does not specify how spaces are to be coalesced very well. | ||
| 57 | * Specifically, the following scenarios are not discussed (note that a | ||
| 58 | * space should be used here, but I am using &nbsp to force the space to | ||
| 59 | * be displayed): | ||
| 60 | * <p> | ||
| 61 | * '<b>blah <i> <strike> foo' which can be treated as: | ||
| 62 | * '<b>blah <i><strike>foo' | ||
| 63 | * <p>as well as: | ||
| 64 | * '<p><a href="xx"> <em>Using</em></a></p>' | ||
| 65 | * which appears to be treated as: | ||
| 66 | * '<p><a href="xx"><em>Using</em></a></p>' | ||
| 67 | * <p> | ||
| 68 | * If <code>strict</code> is false, when a tag that breaks flow, | ||
| 69 | * (<code>TagElement.breaksFlows</code>) or trailing whitespace is | ||
| 70 | * encountered, all whitespace will be ignored until a non whitespace | ||
| 71 | * character is encountered. This appears to give behavior closer to | ||
| 72 | * the popular browsers. | ||
| 73 | * | ||
| 74 | * @see DTD | ||
| 75 | * @see TagElement | ||
| 76 | * @see SimpleAttributeSet | ||
| 77 | * @author Arthur van Hoff | ||
| 78 | * @author Sunita Mani | ||
| 79 | */ | ||
| 80 | public | ||
| 81 | class Parser implements DTDConstants { | ||
| 82 | |||
| 83 | private char text[] = new char[1024]; | ||
| 84 | private int textpos = 0; | ||
| 85 | private TagElement last; | ||
| 86 | private boolean space; | ||
| 87 | |||
| 88 | private char str[] = new char[128]; | ||
| 89 | private int strpos = 0; | ||
| 90 | |||
| 91 | protected DTD dtd = null; | ||
| 92 | |||
| 93 | private int ch; | ||
| 94 | private int ln; | ||
| 95 | private Reader in; | ||
| 96 | |||
| 97 | private Element recent; | ||
| 98 | private TagStack stack; | ||
| 99 | private boolean skipTag = false; | ||
| 100 | private TagElement lastFormSent = null; | ||
| 101 | private SimpleAttributeSet attributes = new SimpleAttributeSet(); | ||
| 102 | |||
| 103 | // State for <html>, <head> and <body>. Since people like to slap | ||
| 104 | // together HTML documents without thinking, occasionally they | ||
| 105 | // have multiple instances of these tags. These booleans track | ||
| 106 | // the first sightings of these tags so they can be safely ignored | ||
| 107 | // by the parser if repeated. | ||
| 108 | private boolean seenHtml = false; | ||
| 109 | private boolean seenHead = false; | ||
| 110 | private boolean seenBody = false; | ||
| 111 | |||
| 112 | /** | ||
| 113 | * The html spec does not specify how spaces are coalesced very well. | ||
| 114 | * If strict == false, ignoreSpace is used to try and mimic the behavior | ||
| 115 | * of the popular browsers. | ||
| 116 | * <p> | ||
| 117 | * The problematic scenarios are: | ||
| 118 | * '<b>blah <i> <strike> foo' which can be treated as: | ||
| 119 | * '<b>blah <i><strike>foo' | ||
| 120 | * as well as: | ||
| 121 | * '<p><a href="xx"> <em>Using</em></a></p>' | ||
| 122 | * which appears to be treated as: | ||
| 123 | * '<p><a href="xx"><em>Using</em></a></p>' | ||
| 124 | * <p> | ||
| 125 | * When a tag that breaks flow, or trailing whitespace is encountered | ||
| 126 | * ignoreSpace is set to true. From then on, all whitespace will be | ||
| 127 | * ignored. | ||
| 128 | * ignoreSpace will be set back to false the first time a | ||
| 129 | * non whitespace character is encountered. This appears to give | ||
| 130 | * behavior closer to the popular browsers. | ||
| 131 | */ | ||
| 132 | private boolean ignoreSpace; | ||
| 133 | |||
| 134 | /** | ||
| 135 | * This flag determines whether or not the Parser will be strict | ||
| 136 | * in enforcing SGML compatibility. If false, it will be lenient | ||
| 137 | * with certain common classes of erroneous HTML constructs. | ||
| 138 | * Strict or not, in either case an error will be recorded. | ||
| 139 | * | ||
| 140 | */ | ||
| 141 | protected boolean strict = false; | ||
| 142 | |||
| 143 | |||
| 144 | /** Number of \r\n's encountered. */ | ||
| 145 | private int crlfCount; | ||
| 146 | /** Number of \r's encountered. A \r\n will not increment this. */ | ||
| 147 | private int crCount; | ||
| 148 | /** Number of \n's encountered. A \r\n will not increment this. */ | ||
| 149 | private int lfCount; | ||
| 150 | |||
| 151 | // | ||
| 152 | // To correctly identify the start of a tag/comment/text we need two | ||
| 153 | // ivars. Two are needed as handleText isn't invoked until the tag | ||
| 154 | // after the text has been parsed, that is the parser parses the text, | ||
| 155 | // then a tag, then invokes handleText followed by handleStart. | ||
| 156 | // | ||
| 157 | /** The start position of the current block. Block is overloaded here, | ||
| 158 | * it really means the current start position for the current comment, | ||
| 159 | * tag, text. Use getBlockStartPosition to access this. */ | ||
| 160 | private int currentBlockStartPos; | ||
| 161 | /** Start position of the last block. */ | ||
| 162 | private int lastBlockStartPos; | ||
| 163 | |||
| 164 | /** | ||
| 165 | * array for mapping numeric references in range | ||
| 166 | * 130-159 to displayable Unicode characters. | ||
| 167 | */ | ||
| 168 | private static final char[] cp1252Map = { | ||
| 169 | 8218, // ‚ | ||
| 170 | 402, // ƒ | ||
| 171 | 8222, // „ | ||
| 172 | 8230, // … | ||
| 173 | 8224, // † | ||
| 174 | 8225, // ‡ | ||
| 175 | 710, // ˆ | ||
| 176 | 8240, // ‰ | ||
| 177 | 352, // Š | ||
| 178 | 8249, // ‹ | ||
| 179 | 338, // Π| ||
| 180 | 141, //  | ||
| 181 | 142, // Ž | ||
| 182 | 143, //  | ||
| 183 | 144, //  | ||
| 184 | 8216, // ‘ | ||
| 185 | 8217, // ’ | ||
| 186 | 8220, // “ | ||
| 187 | 8221, // ” | ||
| 188 | 8226, // • | ||
| 189 | 8211, // – | ||
| 190 | 8212, // — | ||
| 191 | 732, // ˜ | ||
| 192 | 8482, // ™ | ||
| 193 | 353, // š | ||
| 194 | 8250, // › | ||
| 195 | 339, // œ | ||
| 196 | 157, //  | ||
| 197 | 158, // ž | ||
| 198 | 376 // Ÿ | ||
| 199 | }; | ||
| 200 | |||
| 201 | public Parser(DTD dtd) { | ||
| 202 | this.dtd = dtd; | ||
| 203 | } | ||
| 204 | |||
| 205 | |||
| 206 | /** | ||
| 207 | * @return the line number of the line currently being parsed | ||
| 208 | */ | ||
| 209 | protected int getCurrentLine() { | ||
| 210 | return ln; | ||
| 211 | } | ||
| 212 | |||
| 213 | /** | ||
| 214 | * Returns the start position of the current block. Block is | ||
| 215 | * overloaded here, it really means the current start position for | ||
| 216 | * the current comment tag, text, block.... This is provided for | ||
| 217 | * subclassers that wish to know the start of the current block when | ||
| 218 | * called with one of the handleXXX methods. | ||
| 219 | */ | ||
| 220 | int getBlockStartPosition() { | ||
| 221 | return Math.max(0, lastBlockStartPos - 1); | ||
| 222 | } | ||
| 223 | |||
| 224 | /** | ||
| 225 | * Makes a TagElement. | ||
| 226 | */ | ||
| 227 | protected TagElement makeTag(Element elem, boolean fictional) { | ||
| 228 | return new TagElement(elem, fictional); | ||
| 229 | } | ||
| 230 | |||
| 231 | protected TagElement makeTag(Element elem) { | ||
| 232 | return makeTag(elem, false); | ||
| 233 | } | ||
| 234 | |||
| 235 | protected SimpleAttributeSet getAttributes() { | ||
| 236 | return attributes; | ||
| 237 | } | ||
| 238 | |||
| 239 | protected void flushAttributes() { | ||
| 240 | attributes.removeAttributes(attributes); | ||
| 241 | } | ||
| 242 | |||
| 243 | /** | ||
| 244 | * Called when PCDATA is encountered. | ||
| 245 | */ | ||
| 246 | protected void handleText(char text[]) { | ||
| 247 | } | ||
| 248 | |||
| 249 | /** | ||
| 250 | * Called when an HTML title tag is encountered. | ||
| 251 | */ | ||
| 252 | protected void handleTitle(char text[]) { | ||
| 253 | // default behavior is to call handleText. Subclasses | ||
| 254 | // can override if necessary. | ||
| 255 | handleText(text); | ||
| 256 | } | ||
| 257 | |||
| 258 | /** | ||
| 259 | * Called when an HTML comment is encountered. | ||
| 260 | */ | ||
| 261 | protected void handleComment(char text[]) { | ||
| 262 | } | ||
| 263 | |||
| 264 | protected void handleEOFInComment() { | ||
| 265 | // We've reached EOF. Our recovery strategy is to | ||
| 266 | // see if we have more than one line in the comment; | ||
| 267 | // if so, we pretend that the comment was an unterminated | ||
| 268 | // single line comment, and reparse the lines after the | ||
| 269 | // first line as normal HTML content. | ||
| 270 | |||
| 271 | int commentEndPos = strIndexOf('\n'); | ||
| 272 | if (commentEndPos >= 0) { | ||
| 273 | handleComment(getChars(0, commentEndPos)); | ||
| 274 | try { | ||
| 275 | in.close(); | ||
| 276 | in = new CharArrayReader(getChars(commentEndPos + 1)); | ||
| 277 | ch = '>'; | ||
| 278 | } catch (IOException e) { | ||
| 279 | error("ioexception"); | ||
| 280 | } | ||
| 281 | |||
| 282 | resetStrBuffer(); | ||
| 283 | } else { | ||
| 284 | // no newline, so signal an error | ||
| 285 | error("eof.comment"); | ||
| 286 | } | ||
| 287 | } | ||
| 288 | |||
| 289 | /** | ||
| 290 | * Called when an empty tag is encountered. | ||
| 291 | */ | ||
| 292 | protected void handleEmptyTag(TagElement tag) throws ChangedCharSetException { | ||
| 293 | } | ||
| 294 | |||
| 295 | /** | ||
| 296 | * Called when a start tag is encountered. | ||
| 297 | */ | ||
| 298 | protected void handleStartTag(TagElement tag) { | ||
| 299 | } | ||
| 300 | |||
| 301 | /** | ||
| 302 | * Called when an end tag is encountered. | ||
| 303 | */ | ||
| 304 | protected void handleEndTag(TagElement tag) { | ||
| 305 | } | ||
| 306 | |||
| 307 | /** | ||
| 308 | * An error has occurred. | ||
| 309 | */ | ||
| 310 | protected void handleError(int ln, String msg) { | ||
| 311 | /* | ||
| 312 | Thread.dumpStack(); | ||
| 313 | System.out.println("**** " + stack); | ||
| 314 | System.out.println("line " + ln + ": error: " + msg); | ||
| 315 | System.out.println(); | ||
| 316 | */ | ||
| 317 | } | ||
| 318 | |||
| 319 | /** | ||
| 320 | * Output text. | ||
| 321 | */ | ||
| 322 | void handleText(TagElement tag) { | ||
| 323 | if (tag.breaksFlow()) { | ||
| 324 | space = false; | ||
| 325 | if (!strict) { | ||
| 326 | ignoreSpace = true; | ||
| 327 | } | ||
| 328 | } | ||
| 329 | if (textpos == 0) { | ||
| 330 | if ((!space) || (stack == null) || last.breaksFlow() || | ||
| 331 | !stack.advance(dtd.pcdata)) { | ||
| 332 | last = tag; | ||
| 333 | space = false; | ||
| 334 | lastBlockStartPos = currentBlockStartPos; | ||
| 335 | return; | ||
| 336 | } | ||
| 337 | } | ||
| 338 | if (space) { | ||
| 339 | if (!ignoreSpace) { | ||
| 340 | // enlarge buffer if needed | ||
| 341 | if (textpos + 1 > text.length) { | ||
| 342 | char newtext[] = new char[text.length + 200]; | ||
| 343 | System.arraycopy(text, 0, newtext, 0, text.length); | ||
| 344 | text = newtext; | ||
| 345 | } | ||
| 346 | |||
| 347 | // output pending space | ||
| 348 | text[textpos++] = ' '; | ||
| 349 | if (!strict && !tag.getElement().isEmpty()) { | ||
| 350 | ignoreSpace = true; | ||
| 351 | } | ||
| 352 | } | ||
| 353 | space = false; | ||
| 354 | } | ||
| 355 | char newtext[] = new char[textpos]; | ||
| 356 | System.arraycopy(text, 0, newtext, 0, textpos); | ||
| 357 | // Handles cases of bad html where the title tag | ||
| 358 | // was getting lost when we did error recovery. | ||
| 359 | if (tag.getElement().getName().equals("title")) { | ||
| 360 | handleTitle(newtext); | ||
| 361 | } else { | ||
| 362 | handleText(newtext); | ||
| 363 | } | ||
| 364 | lastBlockStartPos = currentBlockStartPos; | ||
| 365 | textpos = 0; | ||
| 366 | last = tag; | ||
| 367 | space = false; | ||
| 368 | } | ||
| 369 | |||
| 370 | /** | ||
| 371 | * Invoke the error handler. | ||
| 372 | */ | ||
| 373 | protected void error(String err, String arg1, String arg2, | ||
| 374 | String arg3) { | ||
| 375 | handleError(ln, err + " " + arg1 + " " + arg2 + " " + arg3); | ||
| 376 | } | ||
| 377 | |||
| 378 | protected void error(String err, String arg1, String arg2) { | ||
| 379 | error(err, arg1, arg2, "?"); | ||
| 380 | } | ||
| 381 | protected void error(String err, String arg1) { | ||
| 382 | error(err, arg1, "?", "?"); | ||
| 383 | } | ||
| 384 | protected void error(String err) { | ||
| 385 | error(err, "?", "?", "?"); | ||
| 386 | } | ||
| 387 | |||
| 388 | |||
| 389 | /** | ||
| 390 | * Handle a start tag. The new tag is pushed | ||
| 391 | * onto the tag stack. The attribute list is | ||
| 392 | * checked for required attributes. | ||
| 393 | */ | ||
| 394 | protected void startTag(TagElement tag) throws ChangedCharSetException { | ||
| 395 | Element elem = tag.getElement(); | ||
| 396 | |||
| 397 | // If the tag is an empty tag and texpos != 0 | ||
| 398 | // this implies that there is text before the | ||
| 399 | // start tag that needs to be processed before | ||
| 400 | // handling the tag. | ||
| 401 | // | ||
| 402 | if (!elem.isEmpty() || | ||
| 403 | ((last != null) && !last.breaksFlow()) || | ||
| 404 | (textpos != 0)) { | ||
| 405 | handleText(tag); | ||
| 406 | } else { | ||
| 407 | // this variable gets updated in handleText(). | ||
| 408 | // Since in this case we do not call handleText() | ||
| 409 | // we need to update it here. | ||
| 410 | // | ||
| 411 | last = tag; | ||
| 412 | // Note that we should really check last.breakFlows before | ||
| 413 | // assuming this should be false. | ||
| 414 | space = false; | ||
| 415 | } | ||
| 416 | lastBlockStartPos = currentBlockStartPos; | ||
| 417 | |||
| 418 | // check required attributes | ||
| 419 | for (AttributeList a = elem.atts ; a != null ; a = a.next) { | ||
| 420 | if ((a.modifier == REQUIRED) && | ||
| 421 | ((attributes.isEmpty()) || | ||
| 422 | ((!attributes.isDefined(a.name)) && | ||
| 423 | (!attributes.isDefined(HTML.getAttributeKey(a.name)))))) { | ||
| 424 | error("req.att ", a.getName(), elem.getName()); | ||
| 425 | } | ||
| 426 | } | ||
| 427 | |||
| 428 | if (elem.isEmpty()) { | ||
| 429 | handleEmptyTag(tag); | ||
| 430 | /* | ||
| 431 | } else if (elem.getName().equals("form")) { | ||
| 432 | handleStartTag(tag); | ||
| 433 | */ | ||
| 434 | } else { | ||
| 435 | recent = elem; | ||
| 436 | stack = new TagStack(tag, stack); | ||
| 437 | handleStartTag(tag); | ||
| 438 | } | ||
| 439 | } | ||
| 440 | |||
| 441 | /** | ||
| 442 | * Handle an end tag. The end tag is popped | ||
| 443 | * from the tag stack. | ||
| 444 | */ | ||
| 445 | protected void endTag(boolean omitted) { | ||
| 446 | handleText(stack.tag); | ||
| 447 | |||
| 448 | if (omitted && !stack.elem.omitEnd()) { | ||
| 449 | error("end.missing", stack.elem.getName()); | ||
| 450 | } else if (!stack.terminate()) { | ||
| 451 | error("end.unexpected", stack.elem.getName()); | ||
| 452 | } | ||
| 453 | |||
| 454 | // handle the tag | ||
| 455 | handleEndTag(stack.tag); | ||
| 456 | stack = stack.next; | ||
| 457 | recent = (stack != null) ? stack.elem : null; | ||
| 458 | } | ||
| 459 | |||
| 460 | |||
| 461 | boolean ignoreElement(Element elem) { | ||
| 462 | |||
| 463 | String stackElement = stack.elem.getName(); | ||
| 464 | String elemName = elem.getName(); | ||
| 465 | /* We ignore all elements that are not valid in the context of | ||
| 466 | a table except <td>, <th> (these we handle in | ||
| 467 | legalElementContext()) and #pcdata. We also ignore the | ||
| 468 | <font> tag in the context of <ul> and <ol> We additonally | ||
| 469 | ignore the <meta> and the <style> tag if the body tag has | ||
| 470 | been seen. **/ | ||
| 471 | if ((elemName.equals("html") && seenHtml) || | ||
| 472 | (elemName.equals("head") && seenHead) || | ||
| 473 | (elemName.equals("body") && seenBody)) { | ||
| 474 | return true; | ||
| 475 | } | ||
| 476 | if (elemName.equals("dt") || elemName.equals("dd")) { | ||
| 477 | TagStack s = stack; | ||
| 478 | while (s != null && !s.elem.getName().equals("dl")) { | ||
| 479 | s = s.next; | ||
| 480 | } | ||
| 481 | if (s == null) { | ||
| 482 | return true; | ||
| 483 | } | ||
| 484 | } | ||
| 485 | |||
| 486 | if (((stackElement.equals("table")) && | ||
| 487 | (!elemName.equals("#pcdata")) && (!elemName.equals("input"))) || | ||
| 488 | ((elemName.equals("font")) && | ||
| 489 | (stackElement.equals("ul") || stackElement.equals("ol"))) || | ||
| 490 | (elemName.equals("meta") && stack != null) || | ||
| 491 | (elemName.equals("style") && seenBody) || | ||
| 492 | (stackElement.equals("table") && elemName.equals("a"))) { | ||
| 493 | return true; | ||
| 494 | } | ||
| 495 | return false; | ||
| 496 | } | ||
| 497 | |||
| 498 | |||
| 499 | /** | ||
| 500 | * Marks the first time a tag has been seen in a document | ||
| 501 | */ | ||
| 502 | |||
| 503 | protected void markFirstTime(Element elem) { | ||
| 504 | String elemName = elem.getName(); | ||
| 505 | if (elemName.equals("html")) { | ||
| 506 | seenHtml = true; | ||
| 507 | } else if (elemName.equals("head")) { | ||
| 508 | seenHead = true; | ||
| 509 | } else if (elemName.equals("body")) { | ||
| 510 | if (buf.length == 1) { | ||
| 511 | // Refer to note in definition of buf for details on this. | ||
| 512 | char[] newBuf = new char[256]; | ||
| 513 | |||
| 514 | newBuf[0] = buf[0]; | ||
| 515 | buf = newBuf; | ||
| 516 | } | ||
| 517 | seenBody = true; | ||
| 518 | } | ||
| 519 | } | ||
| 520 | |||
| 521 | /** | ||
| 522 | * Create a legal content for an element. | ||
| 523 | */ | ||
| 524 | boolean legalElementContext(Element elem) throws ChangedCharSetException { | ||
| 525 | |||
| 526 | // System.out.println("-- legalContext -- " + elem); | ||
| 527 | |||
| 528 | // Deal with the empty stack | ||
| 529 | if (stack == null) { | ||
| 530 | // System.out.println("-- stack is empty"); | ||
| 531 | if (elem != dtd.html) { | ||
| 532 | // System.out.println("-- pushing html"); | ||
| 533 | startTag(makeTag(dtd.html, true)); | ||
| 534 | return legalElementContext(elem); | ||
| 535 | } | ||
| 536 | return true; | ||
| 537 | } | ||
| 538 | |||
| 539 | // Is it allowed in the current context | ||
| 540 | if (stack.advance(elem)) { | ||
| 541 | // System.out.println("-- legal context"); | ||
| 542 | markFirstTime(elem); | ||
| 543 | return true; | ||
| 544 | } | ||
| 545 | boolean insertTag = false; | ||
| 546 | |||
| 547 | // The use of all error recovery strategies are contingent | ||
| 548 | // on the value of the strict property. | ||
| 549 | // | ||
| 550 | // These are commonly occuring errors. if insertTag is true, | ||
| 551 | // then we want to adopt an error recovery strategy that | ||
| 552 | // involves attempting to insert an additional tag to | ||
| 553 | // legalize the context. The two errors addressed here | ||
| 554 | // are: | ||
| 555 | // 1) when a <td> or <th> is seen soon after a <table> tag. | ||
| 556 | // In this case we insert a <tr>. | ||
| 557 | // 2) when any other tag apart from a <tr> is seen | ||
| 558 | // in the context of a <tr>. In this case we would | ||
| 559 | // like to add a <td>. If a <tr> is seen within a | ||
| 560 | // <tr> context, then we will close out the current | ||
| 561 | // <tr>. | ||
| 562 | // | ||
| 563 | // This insertion strategy is handled later in the method. | ||
| 564 | // The reason for checking this now, is that in other cases | ||
| 565 | // we would like to apply other error recovery strategies for example | ||
| 566 | // ignoring tags. | ||
| 567 | // | ||
| 568 | // In certain cases it is better to ignore a tag than try to | ||
| 569 | // fix the situation. So the first test is to see if this | ||
| 570 | // is what we need to do. | ||
| 571 | // | ||
| 572 | String stackElemName = stack.elem.getName(); | ||
| 573 | String elemName = elem.getName(); | ||
| 574 | |||
| 575 | |||
| 576 | if (!strict && | ||
| 577 | ((stackElemName.equals("table") && elemName.equals("td")) || | ||
| 578 | (stackElemName.equals("table") && elemName.equals("th")) || | ||
| 579 | (stackElemName.equals("tr") && !elemName.equals("tr")))){ | ||
| 580 | insertTag = true; | ||
| 581 | } | ||
| 582 | |||
| 583 | |||
| 584 | if (!strict && !insertTag && (stack.elem.getName() != elem.getName() || | ||
| 585 | elem.getName().equals("body"))) { | ||
| 586 | if (skipTag = ignoreElement(elem)) { | ||
| 587 | error("tag.ignore", elem.getName()); | ||
| 588 | return skipTag; | ||
| 589 | } | ||
| 590 | } | ||
| 591 | |||
| 592 | // Check for anything after the start of the table besides tr, td, th | ||
| 593 | // or caption, and if those aren't there, insert the <tr> and call | ||
| 594 | // legalElementContext again. | ||
| 595 | if (!strict && stackElemName.equals("table") && | ||
| 596 | !elemName.equals("tr") && !elemName.equals("td") && | ||
| 597 | !elemName.equals("th") && !elemName.equals("caption")) { | ||
| 598 | Element e = dtd.getElement("tr"); | ||
| 599 | TagElement t = makeTag(e, true); | ||
| 600 | legalTagContext(t); | ||
| 601 | startTag(t); | ||
| 602 | error("start.missing", elem.getName()); | ||
| 603 | return legalElementContext(elem); | ||
| 604 | } | ||
| 605 | |||
| 606 | // They try to find a legal context by checking if the current | ||
| 607 | // tag is valid in an enclosing context. If so | ||
| 608 | // close out the tags by outputing end tags and then | ||
| 609 | // insert the curent tag. If the tags that are | ||
| 610 | // being closed out do not have an optional end tag | ||
| 611 | // specification in the DTD then an html error is | ||
| 612 | // reported. | ||
| 613 | // | ||
| 614 | if (!insertTag && stack.terminate() && (!strict || stack.elem.omitEnd())) { | ||
| 615 | for (TagStack s = stack.next ; s != null ; s = s.next) { | ||
| 616 | if (s.advance(elem)) { | ||
| 617 | while (stack != s) { | ||
| 618 | endTag(true); | ||
| 619 | } | ||
| 620 | return true; | ||
| 621 | } | ||
| 622 | if (!s.terminate() || (strict && !s.elem.omitEnd())) { | ||
| 623 | break; | ||
| 624 | } | ||
| 625 | } | ||
| 626 | } | ||
| 627 | |||
| 628 | // Check if we know what tag is expected next. | ||
| 629 | // If so insert the tag. Report an error if the | ||
| 630 | // tag does not have its start tag spec in the DTD as optional. | ||
| 631 | // | ||
| 632 | Element next = stack.first(); | ||
| 633 | if (next != null && (!strict || next.omitStart()) && | ||
| 634 | !(next==dtd.head && elem==dtd.pcdata) ) { | ||
| 635 | // System.out.println("-- omitting start tag: " + next); | ||
| 636 | TagElement t = makeTag(next, true); | ||
| 637 | legalTagContext(t); | ||
| 638 | startTag(t); | ||
| 639 | if (!next.omitStart()) { | ||
| 640 | error("start.missing", elem.getName()); | ||
| 641 | } | ||
| 642 | return legalElementContext(elem); | ||
| 643 | } | ||
| 644 | |||
| 645 | |||
| 646 | // Traverse the list of expected elements and determine if adding | ||
| 647 | // any of these elements would make for a legal context. | ||
| 648 | // | ||
| 649 | |||
| 650 | if (!strict) { | ||
| 651 | ContentModel content = stack.contentModel(); | ||
| 652 | Vector<Element> elemVec = new Vector<Element>(); | ||
| 653 | if (content != null) { | ||
| 654 | content.getElements(elemVec); | ||
| 655 | for (Element e : elemVec) { | ||
| 656 | // Ensure that this element has not been included as | ||
| 657 | // part of the exclusions in the DTD. | ||
| 658 | // | ||
| 659 | if (stack.excluded(e.getIndex())) { | ||
| 660 | continue; | ||
| 661 | } | ||
| 662 | |||
| 663 | boolean reqAtts = false; | ||
| 664 | |||
| 665 | for (AttributeList a = e.getAttributes(); a != null ; a = a.next) { | ||
| 666 | if (a.modifier == REQUIRED) { | ||
| 667 | reqAtts = true; | ||
| 668 | break; | ||
| 669 | } | ||
| 670 | } | ||
| 671 | // Ensure that no tag that has required attributes | ||
| 672 | // gets inserted. | ||
| 673 | // | ||
| 674 | if (reqAtts) { | ||
| 675 | continue; | ||
| 676 | } | ||
| 677 | |||
| 678 | ContentModel m = e.getContent(); | ||
| 679 | if (m != null && m.first(elem)) { | ||
| 680 | // System.out.println("-- adding a legal tag: " + e); | ||
| 681 | TagElement t = makeTag(e, true); | ||
| 682 | legalTagContext(t); | ||
| 683 | startTag(t); | ||
| 684 | error("start.missing", e.getName()); | ||
| 685 | return legalElementContext(elem); | ||
| 686 | } | ||
| 687 | } | ||
| 688 | } | ||
| 689 | } | ||
| 690 | |||
| 691 | // Check if the stack can be terminated. If so add the appropriate | ||
| 692 | // end tag. Report an error if the tag being ended does not have its | ||
| 693 | // end tag spec in the DTD as optional. | ||
| 694 | // | ||
| 695 | if (stack.terminate() && (stack.elem != dtd.body) && (!strict || stack.elem.omitEnd())) { | ||
| 696 | // System.out.println("-- omitting end tag: " + stack.elem); | ||
| 697 | if (!stack.elem.omitEnd()) { | ||
| 698 | error("end.missing", elem.getName()); | ||
| 699 | } | ||
| 700 | |||
| 701 | endTag(true); | ||
| 702 | return legalElementContext(elem); | ||
| 703 | } | ||
| 704 | |||
| 705 | // At this point we know that something is screwed up. | ||
| 706 | return false; | ||
| 707 | } | ||
| 708 | |||
| 709 | /** | ||
| 710 | * Create a legal context for a tag. | ||
| 711 | */ | ||
| 712 | void legalTagContext(TagElement tag) throws ChangedCharSetException { | ||
| 713 | if (legalElementContext(tag.getElement())) { | ||
| 714 | markFirstTime(tag.getElement()); | ||
| 715 | return; | ||
| 716 | } | ||
| 717 | |||
| 718 | // Avoid putting a block tag in a flow tag. | ||
| 719 | if (tag.breaksFlow() && (stack != null) && !stack.tag.breaksFlow()) { | ||
| 720 | endTag(true); | ||
| 721 | legalTagContext(tag); | ||
| 722 | return; | ||
| 723 | } | ||
| 724 | |||
| 725 | // Avoid putting something wierd in the head of the document. | ||
| 726 | for (TagStack s = stack ; s != null ; s = s.next) { | ||
| 727 | if (s.tag.getElement() == dtd.head) { | ||
| 728 | while (stack != s) { | ||
| 729 | endTag(true); | ||
| 730 | } | ||
| 731 | endTag(true); | ||
| 732 | legalTagContext(tag); | ||
| 733 | return; | ||
| 734 | } | ||
| 735 | } | ||
| 736 | |||
| 737 | // Everything failed | ||
| 738 | error("tag.unexpected", tag.getElement().getName()); | ||
| 739 | } | ||
| 740 | |||
| 741 | /** | ||
| 742 | * Error context. Something went wrong, make sure we are in | ||
| 743 | * the document's body context | ||
| 744 | */ | ||
| 745 | void errorContext() throws ChangedCharSetException { | ||
| 746 | for (; (stack != null) && (stack.tag.getElement() != dtd.body) ; stack = stack.next) { | ||
| 747 | handleEndTag(stack.tag); | ||
| 748 | } | ||
| 749 | if (stack == null) { | ||
| 750 | legalElementContext(dtd.body); | ||
| 751 | startTag(makeTag(dtd.body, true)); | ||
| 752 | } | ||
| 753 | } | ||
| 754 | |||
| 755 | /** | ||
| 756 | * Add a char to the string buffer. | ||
| 757 | */ | ||
| 758 | void addString(int c) { | ||
| 759 | if (strpos == str.length) { | ||
| 760 | char newstr[] = new char[str.length + 128]; | ||
| 761 | System.arraycopy(str, 0, newstr, 0, str.length); | ||
| 762 | str = newstr; | ||
| 763 | } | ||
| 764 | str[strpos++] = (char)c; | ||
| 765 | } | ||
| 766 | |||
| 767 | /** | ||
| 768 | * Get the string that's been accumulated. | ||
| 769 | */ | ||
| 770 | String getString(int pos) { | ||
| 771 | char newStr[] = new char[strpos - pos]; | ||
| 772 | System.arraycopy(str, pos, newStr, 0, strpos - pos); | ||
| 773 | strpos = pos; | ||
| 774 | return new String(newStr); | ||
| 775 | } | ||
| 776 | |||
| 777 | char[] getChars(int pos) { | ||
| 778 | char newStr[] = new char[strpos - pos]; | ||
| 779 | System.arraycopy(str, pos, newStr, 0, strpos - pos); | ||
| 780 | strpos = pos; | ||
| 781 | return newStr; | ||
| 782 | } | ||
| 783 | |||
| 784 | char[] getChars(int pos, int endPos) { | ||
| 785 | char newStr[] = new char[endPos - pos]; | ||
| 786 | System.arraycopy(str, pos, newStr, 0, endPos - pos); | ||
| 787 | // REMIND: it's not clear whether this version should set strpos or not | ||
| 788 | // strpos = pos; | ||
| 789 | return newStr; | ||
| 790 | } | ||
| 791 | |||
| 792 | void resetStrBuffer() { | ||
| 793 | strpos = 0; | ||
| 794 | } | ||
| 795 | |||
| 796 | int strIndexOf(char target) { | ||
| 797 | for (int i = 0; i < strpos; i++) { | ||
| 798 | if (str[i] == target) { | ||
| 799 | return i; | ||
| 800 | } | ||
| 801 | } | ||
| 802 | |||
| 803 | return -1; | ||
| 804 | } | ||
| 805 | |||
| 806 | /** | ||
| 807 | * Skip space. | ||
| 808 | * [5] 297:5 | ||
| 809 | */ | ||
| 810 | void skipSpace() throws IOException { | ||
| 811 | while (true) { | ||
| 812 | switch (ch) { | ||
| 813 | case '\n': | ||
| 814 | ln++; | ||
| 815 | ch = readCh(); | ||
| 816 | lfCount++; | ||
| 817 | break; | ||
| 818 | |||
| 819 | case '\r': | ||
| 820 | ln++; | ||
| 821 | if ((ch = readCh()) == '\n') { | ||
| 822 | ch = readCh(); | ||
| 823 | crlfCount++; | ||
| 824 | } | ||
| 825 | else { | ||
| 826 | crCount++; | ||
| 827 | } | ||
| 828 | break; | ||
| 829 | case ' ': | ||
| 830 | case '\t': | ||
| 831 | ch = readCh(); | ||
| 832 | break; | ||
| 833 | |||
| 834 | default: | ||
| 835 | return; | ||
| 836 | } | ||
| 837 | } | ||
| 838 | } | ||
| 839 | |||
| 840 | /** | ||
| 841 | * Parse identifier. Uppercase characters are folded | ||
| 842 | * to lowercase when lower is true. Returns falsed if | ||
| 843 | * no identifier is found. [55] 346:17 | ||
| 844 | */ | ||
| 845 | boolean parseIdentifier(boolean lower) throws IOException { | ||
| 846 | switch (ch) { | ||
| 847 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': | ||
| 848 | case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': | ||
| 849 | case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': | ||
| 850 | case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': | ||
| 851 | case 'Y': case 'Z': | ||
| 852 | if (lower) { | ||
| 853 | ch = 'a' + (ch - 'A'); | ||
| 854 | } | ||
| 855 | |||
| 856 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': | ||
| 857 | case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': | ||
| 858 | case 'm': case 'n': case 'o': case 'p': case 'q': case 'r': | ||
| 859 | case 's': case 't': case 'u': case 'v': case 'w': case 'x': | ||
| 860 | case 'y': case 'z': | ||
| 861 | break; | ||
| 862 | |||
| 863 | default: | ||
| 864 | return false; | ||
| 865 | } | ||
| 866 | |||
| 867 | while (true) { | ||
| 868 | addString(ch); | ||
| 869 | |||
| 870 | switch (ch = readCh()) { | ||
| 871 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': | ||
| 872 | case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': | ||
| 873 | case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': | ||
| 874 | case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': | ||
| 875 | case 'Y': case 'Z': | ||
| 876 | if (lower) { | ||
| 877 | ch = 'a' + (ch - 'A'); | ||
| 878 | } | ||
| 879 | |||
| 880 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': | ||
| 881 | case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': | ||
| 882 | case 'm': case 'n': case 'o': case 'p': case 'q': case 'r': | ||
| 883 | case 's': case 't': case 'u': case 'v': case 'w': case 'x': | ||
| 884 | case 'y': case 'z': | ||
| 885 | |||
| 886 | case '0': case '1': case '2': case '3': case '4': | ||
| 887 | case '5': case '6': case '7': case '8': case '9': | ||
| 888 | |||
| 889 | case '.': case '-': | ||
| 890 | |||
| 891 | case '_': // not officially allowed | ||
| 892 | break; | ||
| 893 | |||
| 894 | default: | ||
| 895 | return true; | ||
| 896 | } | ||
| 897 | } | ||
| 898 | } | ||
| 899 | |||
| 900 | /** | ||
| 901 | * Parse an entity reference. [59] 350:17 | ||
| 902 | */ | ||
| 903 | private char[] parseEntityReference() throws IOException { | ||
| 904 | int pos = strpos; | ||
| 905 | |||
| 906 | if ((ch = readCh()) == '#') { | ||
| 907 | int n = 0; | ||
| 908 | ch = readCh(); | ||
| 909 | if ((ch >= '0') && (ch <= '9') || | ||
| 910 | ch == 'x' || ch == 'X') { | ||
| 911 | |||
| 912 | if ((ch >= '0') && (ch <= '9')) { | ||
| 913 | // parse decimal reference | ||
| 914 | while ((ch >= '0') && (ch <= '9')) { | ||
| 915 | n = (n * 10) + ch - '0'; | ||
| 916 | ch = readCh(); | ||
| 917 | } | ||
| 918 | } else { | ||
| 919 | // parse hexadecimal reference | ||
| 920 | ch = readCh(); | ||
| 921 | char lch = (char) Character.toLowerCase(ch); | ||
| 922 | while ((lch >= '0') && (lch <= '9') || | ||
| 923 | (lch >= 'a') && (lch <= 'f')) { | ||
| 924 | if (lch >= '0' && lch <= '9') { | ||
| 925 | n = (n * 16) + lch - '0'; | ||
| 926 | } else { | ||
| 927 | n = (n * 16) + lch - 'a' + 10; | ||
| 928 | } | ||
| 929 | ch = readCh(); | ||
| 930 | lch = (char) Character.toLowerCase(ch); | ||
| 931 | } | ||
| 932 | } | ||
| 933 | switch (ch) { | ||
| 934 | case '\n': | ||
| 935 | ln++; | ||
| 936 | ch = readCh(); | ||
| 937 | lfCount++; | ||
| 938 | break; | ||
| 939 | |||
| 940 | case '\r': | ||
| 941 | ln++; | ||
| 942 | if ((ch = readCh()) == '\n') { | ||
| 943 | ch = readCh(); | ||
| 944 | crlfCount++; | ||
| 945 | } | ||
| 946 | else { | ||
| 947 | crCount++; | ||
| 948 | } | ||
| 949 | break; | ||
| 950 | |||
| 951 | case ';': | ||
| 952 | ch = readCh(); | ||
| 953 | break; | ||
| 954 | } | ||
| 955 | char data[] = {mapNumericReference((char) n)}; | ||
| 956 | return data; | ||
| 957 | } | ||
| 958 | addString('#'); | ||
| 959 | if (!parseIdentifier(false)) { | ||
| 960 | error("ident.expected"); | ||
| 961 | strpos = pos; | ||
| 962 | char data[] = {'&', '#'}; | ||
| 963 | return data; | ||
| 964 | } | ||
| 965 | } else if (!parseIdentifier(false)) { | ||
| 966 | char data[] = {'&'}; | ||
| 967 | return data; | ||
| 968 | } | ||
| 969 | |||
| 970 | boolean semicolon = false; | ||
| 971 | |||
| 972 | switch (ch) { | ||
| 973 | case '\n': | ||
| 974 | ln++; | ||
| 975 | ch = readCh(); | ||
| 976 | lfCount++; | ||
| 977 | break; | ||
| 978 | |||
| 979 | case '\r': | ||
| 980 | ln++; | ||
| 981 | if ((ch = readCh()) == '\n') { | ||
| 982 | ch = readCh(); | ||
| 983 | crlfCount++; | ||
| 984 | } | ||
| 985 | else { | ||
| 986 | crCount++; | ||
| 987 | } | ||
| 988 | break; | ||
| 989 | |||
| 990 | case ';': | ||
| 991 | semicolon = true; | ||
| 992 | |||
| 993 | ch = readCh(); | ||
| 994 | break; | ||
| 995 | } | ||
| 996 | |||
| 997 | String nm = getString(pos); | ||
| 998 | Entity ent = dtd.getEntity(nm); | ||
| 999 | |||
| 1000 | // entities are case sensitive - however if strict | ||
| 1001 | // is false then we will try to make a match by | ||
| 1002 | // converting the string to all lowercase. | ||
| 1003 | // | ||
| 1004 | if (!strict && (ent == null)) { | ||
| 1005 | ent = dtd.getEntity(nm.toLowerCase()); | ||
| 1006 | } | ||
| 1007 | if ((ent == null) || !ent.isGeneral()) { | ||
| 1008 | |||
| 1009 | if (nm.length() == 0) { | ||
| 1010 | error("invalid.entref", nm); | ||
| 1011 | return new char[0]; | ||
| 1012 | } | ||
| 1013 | /* given that there is not a match restore the entity reference */ | ||
| 1014 | String str = "&" + nm + (semicolon ? ";" : ""); | ||
| 1015 | |||
| 1016 | char b[] = new char[str.length()]; | ||
| 1017 | str.getChars(0, b.length, b, 0); | ||
| 1018 | return b; | ||
| 1019 | } | ||
| 1020 | return ent.getData(); | ||
| 1021 | } | ||
| 1022 | |||
| 1023 | /** | ||
| 1024 | * Converts numeric character reference to Unicode character. | ||
| 1025 | * | ||
| 1026 | * Normally the code in a reference should be always converted | ||
| 1027 | * to the Unicode character with the same code, but due to | ||
| 1028 | * wide usage of Cp1252 charset most browsers map numeric references | ||
| 1029 | * in the range 130-159 (which are control chars in Unicode set) | ||
| 1030 | * to displayable characters with other codes. | ||
| 1031 | * | ||
| 1032 | * @param c the code of numeric character reference. | ||
| 1033 | * @return the character corresponding to the reference code. | ||
| 1034 | */ | ||
| 1035 | private char mapNumericReference(char c) { | ||
| 1036 | if (c < 130 || c > 159) { | ||
| 1037 | return c; | ||
| 1038 | } | ||
| 1039 | return cp1252Map[c - 130]; | ||
| 1040 | } | ||
| 1041 | |||
| 1042 | /** | ||
| 1043 | * Parse a comment. [92] 391:7 | ||
| 1044 | */ | ||
| 1045 | void parseComment() throws IOException { | ||
| 1046 | |||
| 1047 | while (true) { | ||
| 1048 | int c = ch; | ||
| 1049 | switch (c) { | ||
| 1050 | case '-': | ||
| 1051 | /** Presuming that the start string of a comment "<!--" has | ||
| 1052 | already been parsed, the '-' character is valid only as | ||
| 1053 | part of a comment termination and further more it must | ||
| 1054 | be present in even numbers. Hence if strict is true, we | ||
| 1055 | presume the comment has been terminated and return. | ||
| 1056 | However if strict is false, then there is no even number | ||
| 1057 | requirement and this character can appear anywhere in the | ||
| 1058 | comment. The parser reads on until it sees the following | ||
| 1059 | pattern: "-->" or "--!>". | ||
| 1060 | **/ | ||
| 1061 | if (!strict && (strpos != 0) && (str[strpos - 1] == '-')) { | ||
| 1062 | if ((ch = readCh()) == '>') { | ||
| 1063 | return; | ||
| 1064 | } | ||
| 1065 | if (ch == '!') { | ||
| 1066 | if ((ch = readCh()) == '>') { | ||
| 1067 | return; | ||
| 1068 | } else { | ||
| 1069 | /* to account for extra read()'s that happened */ | ||
| 1070 | addString('-'); | ||
| 1071 | addString('!'); | ||
| 1072 | continue; | ||
| 1073 | } | ||
| 1074 | } | ||
| 1075 | break; | ||
| 1076 | } | ||
| 1077 | |||
| 1078 | if ((ch = readCh()) == '-') { | ||
| 1079 | ch = readCh(); | ||
| 1080 | if (strict || ch == '>') { | ||
| 1081 | return; | ||
| 1082 | } | ||
| 1083 | if (ch == '!') { | ||
| 1084 | if ((ch = readCh()) == '>') { | ||
| 1085 | return; | ||
| 1086 | } else { | ||
| 1087 | /* to account for extra read()'s that happened */ | ||
| 1088 | addString('-'); | ||
| 1089 | addString('!'); | ||
| 1090 | continue; | ||
| 1091 | } | ||
| 1092 | } | ||
| 1093 | /* to account for the extra read() */ | ||
| 1094 | addString('-'); | ||
| 1095 | } | ||
| 1096 | break; | ||
| 1097 | |||
| 1098 | case -1: | ||
| 1099 | handleEOFInComment(); | ||
| 1100 | return; | ||
| 1101 | |||
| 1102 | case '\n': | ||
| 1103 | ln++; | ||
| 1104 | ch = readCh(); | ||
| 1105 | lfCount++; | ||
| 1106 | break; | ||
| 1107 | |||
| 1108 | case '>': | ||
| 1109 | ch = readCh(); | ||
| 1110 | break; | ||
| 1111 | |||
| 1112 | case '\r': | ||
| 1113 | ln++; | ||
| 1114 | if ((ch = readCh()) == '\n') { | ||
| 1115 | ch = readCh(); | ||
| 1116 | crlfCount++; | ||
| 1117 | } | ||
| 1118 | else { | ||
| 1119 | crCount++; | ||
| 1120 | } | ||
| 1121 | c = '\n'; | ||
| 1122 | break; | ||
| 1123 | default: | ||
| 1124 | ch = readCh(); | ||
| 1125 | break; | ||
| 1126 | } | ||
| 1127 | |||
| 1128 | addString(c); | ||
| 1129 | } | ||
| 1130 | } | ||
| 1131 | |||
| 1132 | /** | ||
| 1133 | * Parse literal content. [46] 343:1 and [47] 344:1 | ||
| 1134 | */ | ||
| 1135 | void parseLiteral(boolean replace) throws IOException { | ||
| 1136 | while (true) { | ||
| 1137 | int c = ch; | ||
| 1138 | switch (c) { | ||
| 1139 | case -1: | ||
| 1140 | error("eof.literal", stack.elem.getName()); | ||
| 1141 | endTag(true); | ||
| 1142 | return; | ||
| 1143 | |||
| 1144 | case '>': | ||
| 1145 | ch = readCh(); | ||
| 1146 | int i = textpos - (stack.elem.name.length() + 2), j = 0; | ||
| 1147 | |||
| 1148 | // match end tag | ||
| 1149 | if ((i >= 0) && (text[i++] == '<') && (text[i] == '/')) { | ||
| 1150 | while ((++i < textpos) && | ||
| 1151 | (Character.toLowerCase(text[i]) == stack.elem.name.charAt(j++))); | ||
| 1152 | if (i == textpos) { | ||
| 1153 | textpos -= (stack.elem.name.length() + 2); | ||
| 1154 | if ((textpos > 0) && (text[textpos-1] == '\n')) { | ||
| 1155 | textpos--; | ||
| 1156 | } | ||
| 1157 | endTag(false); | ||
| 1158 | return; | ||
| 1159 | } | ||
| 1160 | } | ||
| 1161 | break; | ||
| 1162 | |||
| 1163 | case '&': | ||
| 1164 | char data[] = parseEntityReference(); | ||
| 1165 | if (textpos + data.length > text.length) { | ||
| 1166 | char newtext[] = new char[Math.max(textpos + data.length + 128, text.length * 2)]; | ||
| 1167 | System.arraycopy(text, 0, newtext, 0, text.length); | ||
| 1168 | text = newtext; | ||
| 1169 | } | ||
| 1170 | System.arraycopy(data, 0, text, textpos, data.length); | ||
| 1171 | textpos += data.length; | ||
| 1172 | continue; | ||
| 1173 | |||
| 1174 | case '\n': | ||
| 1175 | ln++; | ||
| 1176 | ch = readCh(); | ||
| 1177 | lfCount++; | ||
| 1178 | break; | ||
| 1179 | |||
| 1180 | case '\r': | ||
| 1181 | ln++; | ||
| 1182 | if ((ch = readCh()) == '\n') { | ||
| 1183 | ch = readCh(); | ||
| 1184 | crlfCount++; | ||
| 1185 | } | ||
| 1186 | else { | ||
| 1187 | crCount++; | ||
| 1188 | } | ||
| 1189 | c = '\n'; | ||
| 1190 | break; | ||
| 1191 | default: | ||
| 1192 | ch = readCh(); | ||
| 1193 | break; | ||
| 1194 | } | ||
| 1195 | |||
| 1196 | // output character | ||
| 1197 | if (textpos == text.length) { | ||
| 1198 | char newtext[] = new char[text.length + 128]; | ||
| 1199 | System.arraycopy(text, 0, newtext, 0, text.length); | ||
| 1200 | text = newtext; | ||
| 1201 | } | ||
| 1202 | text[textpos++] = (char)c; | ||
| 1203 | } | ||
| 1204 | } | ||
| 1205 | |||
| 1206 | /** | ||
| 1207 | * Parse attribute value. [33] 331:1 | ||
| 1208 | */ | ||
| 1209 | String parseAttributeValue(boolean lower) throws IOException { | ||
| 1210 | int delim = -1; | ||
| 1211 | |||
| 1212 | // Check for a delimiter | ||
| 1213 | switch(ch) { | ||
| 1214 | case '\'': | ||
| 1215 | case '"': | ||
| 1216 | delim = ch; | ||
| 1217 | ch = readCh(); | ||
| 1218 | break; | ||
| 1219 | } | ||
| 1220 | |||
| 1221 | // Parse the rest of the value | ||
| 1222 | while (true) { | ||
| 1223 | int c = ch; | ||
| 1224 | |||
| 1225 | switch (c) { | ||
| 1226 | case '\n': | ||
| 1227 | ln++; | ||
| 1228 | ch = readCh(); | ||
| 1229 | lfCount++; | ||
| 1230 | if (delim < 0) { | ||
| 1231 | return getString(0); | ||
| 1232 | } | ||
| 1233 | break; | ||
| 1234 | |||
| 1235 | case '\r': | ||
| 1236 | ln++; | ||
| 1237 | |||
| 1238 | if ((ch = readCh()) == '\n') { | ||
| 1239 | ch = readCh(); | ||
| 1240 | crlfCount++; | ||
| 1241 | } | ||
| 1242 | else { | ||
| 1243 | crCount++; | ||
| 1244 | } | ||
| 1245 | if (delim < 0) { | ||
| 1246 | return getString(0); | ||
| 1247 | } | ||
| 1248 | break; | ||
| 1249 | |||
| 1250 | case '\t': | ||
| 1251 | if (delim < 0) | ||
| 1252 | c = ' '; | ||
| 1253 | case ' ': | ||
| 1254 | ch = readCh(); | ||
| 1255 | if (delim < 0) { | ||
| 1256 | return getString(0); | ||
| 1257 | } | ||
| 1258 | break; | ||
| 1259 | |||
| 1260 | case '>': | ||
| 1261 | case '<': | ||
| 1262 | if (delim < 0) { | ||
| 1263 | return getString(0); | ||
| 1264 | } | ||
| 1265 | ch = readCh(); | ||
| 1266 | break; | ||
| 1267 | |||
| 1268 | case '\'': | ||
| 1269 | case '"': | ||
| 1270 | ch = readCh(); | ||
| 1271 | if (c == delim) { | ||
| 1272 | return getString(0); | ||
| 1273 | } else if (delim == -1) { | ||
| 1274 | error("attvalerr"); | ||
| 1275 | if (strict || ch == ' ') { | ||
| 1276 | return getString(0); | ||
| 1277 | } else { | ||
| 1278 | continue; | ||
| 1279 | } | ||
| 1280 | } | ||
| 1281 | break; | ||
| 1282 | |||
| 1283 | case '=': | ||
| 1284 | if (delim < 0) { | ||
| 1285 | /* In SGML a construct like <img src=/cgi-bin/foo?x=1> | ||
| 1286 | is considered invalid since an = sign can only be contained | ||
| 1287 | in an attributes value if the string is quoted. | ||
| 1288 | */ | ||
| 1289 | error("attvalerr"); | ||
| 1290 | /* If strict is true then we return with the string we have thus far. | ||
| 1291 | Otherwise we accept the = sign as part of the attribute's value and | ||
| 1292 | process the rest of the img tag. */ | ||
| 1293 | if (strict) { | ||
| 1294 | return getString(0); | ||
| 1295 | } | ||
| 1296 | } | ||
| 1297 | ch = readCh(); | ||
| 1298 | break; | ||
| 1299 | |||
| 1300 | case '&': | ||
| 1301 | if (strict && delim < 0) { | ||
| 1302 | ch = readCh(); | ||
| 1303 | break; | ||
| 1304 | } | ||
| 1305 | |||
| 1306 | char data[] = parseEntityReference(); | ||
| 1307 | for (int i = 0 ; i < data.length ; i++) { | ||
| 1308 | c = data[i]; | ||
| 1309 | addString((lower && (c >= 'A') && (c <= 'Z')) ? 'a' + c - 'A' : c); | ||
| 1310 | } | ||
| 1311 | continue; | ||
| 1312 | |||
| 1313 | case -1: | ||
| 1314 | return getString(0); | ||
| 1315 | |||
| 1316 | default: | ||
| 1317 | if (lower && (c >= 'A') && (c <= 'Z')) { | ||
| 1318 | c = 'a' + c - 'A'; | ||
| 1319 | } | ||
| 1320 | ch = readCh(); | ||
| 1321 | break; | ||
| 1322 | } | ||
| 1323 | addString(c); | ||
| 1324 | } | ||
| 1325 | } | ||
| 1326 | |||
| 1327 | |||
| 1328 | /** | ||
| 1329 | * Parse attribute specification List. [31] 327:17 | ||
| 1330 | */ | ||
| 1331 | void parseAttributeSpecificationList(Element elem) throws IOException { | ||
| 1332 | |||
| 1333 | while (true) { | ||
| 1334 | skipSpace(); | ||
| 1335 | |||
| 1336 | switch (ch) { | ||
| 1337 | case '/': | ||
| 1338 | case '>': | ||
| 1339 | case '<': | ||
| 1340 | case -1: | ||
| 1341 | return; | ||
| 1342 | |||
| 1343 | case '-': | ||
| 1344 | if ((ch = readCh()) == '-') { | ||
| 1345 | ch = readCh(); | ||
| 1346 | parseComment(); | ||
| 1347 | strpos = 0; | ||
| 1348 | } else { | ||
| 1349 | error("invalid.tagchar", "-", elem.getName()); | ||
| 1350 | ch = readCh(); | ||
| 1351 | } | ||
| 1352 | continue; | ||
| 1353 | } | ||
| 1354 | |||
| 1355 | AttributeList att; | ||
| 1356 | String attname; | ||
| 1357 | String attvalue; | ||
| 1358 | |||
| 1359 | if (parseIdentifier(true)) { | ||
| 1360 | attname = getString(0); | ||
| 1361 | skipSpace(); | ||
| 1362 | if (ch == '=') { | ||
| 1363 | ch = readCh(); | ||
| 1364 | skipSpace(); | ||
| 1365 | att = elem.getAttribute(attname); | ||
| 1366 | // Bug ID 4102750 | ||
| 1367 | // Load the NAME of an Attribute Case Sensitive | ||
| 1368 | // The case of the NAME must be intact | ||
| 1369 | // MG 021898 | ||
| 1370 | attvalue = parseAttributeValue((att != null) && (att.type != CDATA) && (att.type != NOTATION) && (att.type != NAME)); | ||
| 1371 | // attvalue = parseAttributeValue((att != null) && (att.type != CDATA) && (att.type != NOTATION)); | ||
| 1372 | } else { | ||
| 1373 | attvalue = attname; | ||
| 1374 | att = elem.getAttributeByValue(attvalue); | ||
| 1375 | if (att == null) { | ||
| 1376 | att = elem.getAttribute(attname); | ||
| 1377 | if (att != null) { | ||
| 1378 | attvalue = att.getValue(); | ||
| 1379 | } | ||
| 1380 | else { | ||
| 1381 | // Make it null so that NULL_ATTRIBUTE_VALUE is | ||
| 1382 | // used | ||
| 1383 | attvalue = null; | ||
| 1384 | } | ||
| 1385 | } | ||
| 1386 | } | ||
| 1387 | } else if (!strict && ch == ',') { // allows for comma separated attribute-value pairs | ||
| 1388 | ch = readCh(); | ||
| 1389 | continue; | ||
| 1390 | } else if (!strict && ch == '"') { // allows for quoted attributes | ||
| 1391 | ch = readCh(); | ||
| 1392 | skipSpace(); | ||
| 1393 | if (parseIdentifier(true)) { | ||
| 1394 | attname = getString(0); | ||
| 1395 | if (ch == '"') { | ||
| 1396 | ch = readCh(); | ||
| 1397 | } | ||
| 1398 | skipSpace(); | ||
| 1399 | if (ch == '=') { | ||
| 1400 | ch = readCh(); | ||
| 1401 | skipSpace(); | ||
| 1402 | att = elem.getAttribute(attname); | ||
| 1403 | attvalue = parseAttributeValue((att != null) && | ||
| 1404 | (att.type != CDATA) && | ||
| 1405 | (att.type != NOTATION)); | ||
| 1406 | } else { | ||
| 1407 | attvalue = attname; | ||
| 1408 | att = elem.getAttributeByValue(attvalue); | ||
| 1409 | if (att == null) { | ||
| 1410 | att = elem.getAttribute(attname); | ||
| 1411 | if (att != null) { | ||
| 1412 | attvalue = att.getValue(); | ||
| 1413 | } | ||
| 1414 | } | ||
| 1415 | } | ||
| 1416 | } else { | ||
| 1417 | char str[] = {(char)ch}; | ||
| 1418 | error("invalid.tagchar", new String(str), elem.getName()); | ||
| 1419 | ch = readCh(); | ||
| 1420 | continue; | ||
| 1421 | } | ||
| 1422 | } else if (!strict && (attributes.isEmpty()) && (ch == '=')) { | ||
| 1423 | ch = readCh(); | ||
| 1424 | skipSpace(); | ||
| 1425 | attname = elem.getName(); | ||
| 1426 | att = elem.getAttribute(attname); | ||
| 1427 | attvalue = parseAttributeValue((att != null) && | ||
| 1428 | (att.type != CDATA) && | ||
| 1429 | (att.type != NOTATION)); | ||
| 1430 | } else if (!strict && (ch == '=')) { | ||
| 1431 | ch = readCh(); | ||
| 1432 | skipSpace(); | ||
| 1433 | attvalue = parseAttributeValue(true); | ||
| 1434 | error("attvalerr"); | ||
| 1435 | return; | ||
| 1436 | } else { | ||
| 1437 | char str[] = {(char)ch}; | ||
| 1438 | error("invalid.tagchar", new String(str), elem.getName()); | ||
| 1439 | if (!strict) { | ||
| 1440 | ch = readCh(); | ||
| 1441 | continue; | ||
| 1442 | } else { | ||
| 1443 | return; | ||
| 1444 | } | ||
| 1445 | } | ||
| 1446 | |||
| 1447 | if (att != null) { | ||
| 1448 | attname = att.getName(); | ||
| 1449 | } else { | ||
| 1450 | error("invalid.tagatt", attname, elem.getName()); | ||
| 1451 | } | ||
| 1452 | |||
| 1453 | // Check out the value | ||
| 1454 | if (attributes.isDefined(attname)) { | ||
| 1455 | error("multi.tagatt", attname, elem.getName()); | ||
| 1456 | } | ||
| 1457 | if (attvalue == null) { | ||
| 1458 | attvalue = ((att != null) && (att.value != null)) ? att.value : | ||
| 1459 | HTML.NULL_ATTRIBUTE_VALUE; | ||
| 1460 | } else if ((att != null) && (att.values != null) && !att.values.contains(attvalue)) { | ||
| 1461 | error("invalid.tagattval", attname, elem.getName()); | ||
| 1462 | } | ||
| 1463 | HTML.Attribute attkey = HTML.getAttributeKey(attname); | ||
| 1464 | if (attkey == null) { | ||
| 1465 | attributes.addAttribute(attname, attvalue); | ||
| 1466 | } else { | ||
| 1467 | attributes.addAttribute(attkey, attvalue); | ||
| 1468 | } | ||
| 1469 | } | ||
| 1470 | } | ||
| 1471 | |||
| 1472 | /** | ||
| 1473 | * Parses th Document Declaration Type markup declaration. | ||
| 1474 | * Currently ignores it. | ||
| 1475 | */ | ||
| 1476 | public String parseDTDMarkup() throws IOException { | ||
| 1477 | |||
| 1478 | StringBuilder strBuff = new StringBuilder(); | ||
| 1479 | ch = readCh(); | ||
| 1480 | while(true) { | ||
| 1481 | switch (ch) { | ||
| 1482 | case '>': | ||
| 1483 | ch = readCh(); | ||
| 1484 | return strBuff.toString(); | ||
| 1485 | case -1: | ||
| 1486 | error("invalid.markup"); | ||
| 1487 | return strBuff.toString(); | ||
| 1488 | case '\n': | ||
| 1489 | ln++; | ||
| 1490 | ch = readCh(); | ||
| 1491 | lfCount++; | ||
| 1492 | break; | ||
| 1493 | case '"': | ||
| 1494 | ch = readCh(); | ||
| 1495 | break; | ||
| 1496 | case '\r': | ||
| 1497 | ln++; | ||
| 1498 | if ((ch = readCh()) == '\n') { | ||
| 1499 | ch = readCh(); | ||
| 1500 | crlfCount++; | ||
| 1501 | } | ||
| 1502 | else { | ||
| 1503 | crCount++; | ||
| 1504 | } | ||
| 1505 | break; | ||
| 1506 | default: | ||
| 1507 | strBuff.append((char)(ch & 0xFF)); | ||
| 1508 | ch = readCh(); | ||
| 1509 | break; | ||
| 1510 | } | ||
| 1511 | } | ||
| 1512 | } | ||
| 1513 | |||
| 1514 | /** | ||
| 1515 | * Parse markup declarations. | ||
| 1516 | * Currently only handles the Document Type Declaration markup. | ||
| 1517 | * Returns true if it is a markup declaration false otherwise. | ||
| 1518 | */ | ||
| 1519 | protected boolean parseMarkupDeclarations(StringBuffer strBuff) throws IOException { | ||
| 1520 | |||
| 1521 | /* Currently handles only the DOCTYPE */ | ||
| 1522 | if ((strBuff.length() == "DOCTYPE".length()) && | ||
| 1523 | (strBuff.toString().toUpperCase().equals("DOCTYPE"))) { | ||
| 1524 | parseDTDMarkup(); | ||
| 1525 | return true; | ||
| 1526 | } | ||
| 1527 | return false; | ||
| 1528 | } | ||
| 1529 | |||
| 1530 | /** | ||
| 1531 | * Parse an invalid tag. | ||
| 1532 | */ | ||
| 1533 | void parseInvalidTag() throws IOException { | ||
| 1534 | // ignore all data upto the close bracket '>' | ||
| 1535 | while (true) { | ||
| 1536 | skipSpace(); | ||
| 1537 | switch (ch) { | ||
| 1538 | case '>': | ||
| 1539 | case -1: | ||
| 1540 | ch = readCh(); | ||
| 1541 | return; | ||
| 1542 | case '<': | ||
| 1543 | return; | ||
| 1544 | default: | ||
| 1545 | ch = readCh(); | ||
| 1546 | |||
| 1547 | } | ||
| 1548 | } | ||
| 1549 | } | ||
| 1550 | |||
| 1551 | /** | ||
| 1552 | * Parse a start or end tag. | ||
| 1553 | */ | ||
| 1554 | void parseTag() throws IOException { | ||
| 1555 | Element elem; | ||
| 1556 | boolean net = false; | ||
| 1557 | boolean warned = false; | ||
| 1558 | boolean unknown = false; | ||
| 1559 | |||
| 1560 | switch (ch = readCh()) { | ||
| 1561 | case '!': | ||
| 1562 | switch (ch = readCh()) { | ||
| 1563 | case '-': | ||
| 1564 | // Parse comment. [92] 391:7 | ||
| 1565 | while (true) { | ||
| 1566 | if (ch == '-') { | ||
| 1567 | if (!strict || ((ch = readCh()) == '-')) { | ||
| 1568 | ch = readCh(); | ||
| 1569 | if (!strict && ch == '-') { | ||
| 1570 | ch = readCh(); | ||
| 1571 | } | ||
| 1572 | // send over any text you might see | ||
| 1573 | // before parsing and sending the | ||
| 1574 | // comment | ||
| 1575 | if (textpos != 0) { | ||
| 1576 | char newtext[] = new char[textpos]; | ||
| 1577 | System.arraycopy(text, 0, newtext, 0, textpos); | ||
| 1578 | handleText(newtext); | ||
| 1579 | lastBlockStartPos = currentBlockStartPos; | ||
| 1580 | textpos = 0; | ||
| 1581 | } | ||
| 1582 | parseComment(); | ||
| 1583 | last = makeTag(dtd.getElement("comment"), true); | ||
| 1584 | handleComment(getChars(0)); | ||
| 1585 | continue; | ||
| 1586 | } else if (!warned) { | ||
| 1587 | warned = true; | ||
| 1588 | error("invalid.commentchar", "-"); | ||
| 1589 | } | ||
| 1590 | } | ||
| 1591 | skipSpace(); | ||
| 1592 | switch (ch) { | ||
| 1593 | case '-': | ||
| 1594 | continue; | ||
| 1595 | case '>': | ||
| 1596 | ch = readCh(); | ||
| 1597 | case -1: | ||
| 1598 | return; | ||
| 1599 | default: | ||
| 1600 | ch = readCh(); | ||
| 1601 | if (!warned) { | ||
| 1602 | warned = true; | ||
| 1603 | error("invalid.commentchar", | ||
| 1604 | String.valueOf((char)ch)); | ||
| 1605 | } | ||
| 1606 | break; | ||
| 1607 | } | ||
| 1608 | } | ||
| 1609 | |||
| 1610 | default: | ||
| 1611 | // deal with marked sections | ||
| 1612 | StringBuffer strBuff = new StringBuffer(); | ||
| 1613 | while (true) { | ||
| 1614 | strBuff.append((char)ch); | ||
| 1615 | if (parseMarkupDeclarations(strBuff)) { | ||
| 1616 | return; | ||
| 1617 | } | ||
| 1618 | switch(ch) { | ||
| 1619 | case '>': | ||
| 1620 | ch = readCh(); | ||
| 1621 | case -1: | ||
| 1622 | error("invalid.markup"); | ||
| 1623 | return; | ||
| 1624 | case '\n': | ||
| 1625 | ln++; | ||
| 1626 | ch = readCh(); | ||
| 1627 | lfCount++; | ||
| 1628 | break; | ||
| 1629 | case '\r': | ||
| 1630 | ln++; | ||
| 1631 | if ((ch = readCh()) == '\n') { | ||
| 1632 | ch = readCh(); | ||
| 1633 | crlfCount++; | ||
| 1634 | } | ||
| 1635 | else { | ||
| 1636 | crCount++; | ||
| 1637 | } | ||
| 1638 | break; | ||
| 1639 | |||
| 1640 | default: | ||
| 1641 | ch = readCh(); | ||
| 1642 | break; | ||
| 1643 | } | ||
| 1644 | } | ||
| 1645 | } | ||
| 1646 | |||
| 1647 | case '/': | ||
| 1648 | // parse end tag [19] 317:4 | ||
| 1649 | switch (ch = readCh()) { | ||
| 1650 | case '>': | ||
| 1651 | ch = readCh(); | ||
| 1652 | case '<': | ||
| 1653 | // empty end tag. either </> or </< | ||
| 1654 | if (recent == null) { | ||
| 1655 | error("invalid.shortend"); | ||
| 1656 | return; | ||
| 1657 | } | ||
| 1658 | elem = recent; | ||
| 1659 | break; | ||
| 1660 | |||
| 1661 | default: | ||
| 1662 | if (!parseIdentifier(true)) { | ||
| 1663 | error("expected.endtagname"); | ||
| 1664 | return; | ||
| 1665 | } | ||
| 1666 | skipSpace(); | ||
| 1667 | switch (ch) { | ||
| 1668 | case '>': | ||
| 1669 | ch = readCh(); | ||
| 1670 | case '<': | ||
| 1671 | break; | ||
| 1672 | |||
| 1673 | default: | ||
| 1674 | error("expected", "'>'"); | ||
| 1675 | while ((ch != -1) && (ch != '\n') && (ch != '>')) { | ||
| 1676 | ch = readCh(); | ||
| 1677 | } | ||
| 1678 | if (ch == '>') { | ||
| 1679 | ch = readCh(); | ||
| 1680 | } | ||
| 1681 | break; | ||
| 1682 | } | ||
| 1683 | String elemStr = getString(0); | ||
| 1684 | if (!dtd.elementExists(elemStr)) { | ||
| 1685 | error("end.unrecognized", elemStr); | ||
| 1686 | // Ignore RE before end tag | ||
| 1687 | if ((textpos > 0) && (text[textpos-1] == '\n')) { | ||
| 1688 | textpos--; | ||
| 1689 | } | ||
| 1690 | elem = dtd.getElement("unknown"); | ||
| 1691 | elem.name = elemStr; | ||
| 1692 | unknown = true; | ||
| 1693 | } else { | ||
| 1694 | elem = dtd.getElement(elemStr); | ||
| 1695 | } | ||
| 1696 | break; | ||
| 1697 | } | ||
| 1698 | |||
| 1699 | |||
| 1700 | // If the stack is null, we're seeing end tags without any begin | ||
| 1701 | // tags. Ignore them. | ||
| 1702 | |||
| 1703 | if (stack == null) { | ||
| 1704 | error("end.extra.tag", elem.getName()); | ||
| 1705 | return; | ||
| 1706 | } | ||
| 1707 | |||
| 1708 | // Ignore RE before end tag | ||
| 1709 | if ((textpos > 0) && (text[textpos-1] == '\n')) { | ||
| 1710 | // In a pre tag, if there are blank lines | ||
| 1711 | // we do not want to remove the newline | ||
| 1712 | // before the end tag. Hence this code. | ||
| 1713 | // | ||
| 1714 | if (stack.pre) { | ||
| 1715 | if ((textpos > 1) && (text[textpos-2] != '\n')) { | ||
| 1716 | textpos--; | ||
| 1717 | } | ||
| 1718 | } else { | ||
| 1719 | textpos--; | ||
| 1720 | } | ||
| 1721 | } | ||
| 1722 | |||
| 1723 | // If the end tag is a form, since we did not put it | ||
| 1724 | // on the tag stack, there is no corresponding start | ||
| 1725 | // start tag to find. Hence do not touch the tag stack. | ||
| 1726 | // | ||
| 1727 | |||
| 1728 | /* | ||
| 1729 | if (!strict && elem.getName().equals("form")) { | ||
| 1730 | if (lastFormSent != null) { | ||
| 1731 | handleEndTag(lastFormSent); | ||
| 1732 | return; | ||
| 1733 | } else { | ||
| 1734 | // do nothing. | ||
| 1735 | return; | ||
| 1736 | } | ||
| 1737 | } | ||
| 1738 | */ | ||
| 1739 | |||
| 1740 | if (unknown) { | ||
| 1741 | // we will not see a corresponding start tag | ||
| 1742 | // on the the stack. If we are seeing an | ||
| 1743 | // end tag, lets send this on as an empty | ||
| 1744 | // tag with the end tag attribute set to | ||
| 1745 | // true. | ||
| 1746 | TagElement t = makeTag(elem); | ||
| 1747 | handleText(t); | ||
| 1748 | attributes.addAttribute(HTML.Attribute.ENDTAG, "true"); | ||
| 1749 | handleEmptyTag(makeTag(elem)); | ||
| 1750 | unknown = false; | ||
| 1751 | return; | ||
| 1752 | } | ||
| 1753 | |||
| 1754 | // find the corresponding start tag | ||
| 1755 | |||
| 1756 | // A commonly occuring error appears to be the insertion | ||
| 1757 | // of extra end tags in a table. The intent here is ignore | ||
| 1758 | // such extra end tags. | ||
| 1759 | // | ||
| 1760 | if (!strict) { | ||
| 1761 | String stackElem = stack.elem.getName(); | ||
| 1762 | |||
| 1763 | if (stackElem.equals("table")) { | ||
| 1764 | // If it isnt a valid end tag ignore it and return | ||
| 1765 | // | ||
| 1766 | if (!elem.getName().equals(stackElem)) { | ||
| 1767 | error("tag.ignore", elem.getName()); | ||
| 1768 | return; | ||
| 1769 | } | ||
| 1770 | } | ||
| 1771 | |||
| 1772 | |||
| 1773 | |||
| 1774 | if (stackElem.equals("tr") || | ||
| 1775 | stackElem.equals("td")) { | ||
| 1776 | if ((!elem.getName().equals("table")) && | ||
| 1777 | (!elem.getName().equals(stackElem))) { | ||
| 1778 | error("tag.ignore", elem.getName()); | ||
| 1779 | return; | ||
| 1780 | } | ||
| 1781 | } | ||
| 1782 | } | ||
| 1783 | TagStack sp = stack; | ||
| 1784 | |||
| 1785 | while ((sp != null) && (elem != sp.elem)) { | ||
| 1786 | sp = sp.next; | ||
| 1787 | } | ||
| 1788 | if (sp == null) { | ||
| 1789 | error("unmatched.endtag", elem.getName()); | ||
| 1790 | return; | ||
| 1791 | } | ||
| 1792 | |||
| 1793 | // People put font ending tags in the darndest places. | ||
| 1794 | // Don't close other contexts based on them being between | ||
| 1795 | // a font tag and the corresponding end tag. Instead, | ||
| 1796 | // ignore the end tag like it doesn't exist and allow the end | ||
| 1797 | // of the document to close us out. | ||
| 1798 | String elemName = elem.getName(); | ||
| 1799 | if (stack != sp && | ||
| 1800 | (elemName.equals("font") || | ||
| 1801 | elemName.equals("center"))) { | ||
| 1802 | |||
| 1803 | // Since closing out a center tag can have real wierd | ||
| 1804 | // effects on the formatting, make sure that tags | ||
| 1805 | // for which omitting an end tag is legimitate | ||
| 1806 | // get closed out. | ||
| 1807 | // | ||
| 1808 | if (elemName.equals("center")) { | ||
| 1809 | while(stack.elem.omitEnd() && stack != sp) { | ||
| 1810 | endTag(true); | ||
| 1811 | } | ||
| 1812 | if (stack.elem == elem) { | ||
| 1813 | endTag(false); | ||
| 1814 | } | ||
| 1815 | } | ||
| 1816 | return; | ||
| 1817 | } | ||
| 1818 | // People do the same thing with center tags. In this | ||
| 1819 | // case we would like to close off the center tag but | ||
| 1820 | // not necessarily all enclosing tags. | ||
| 1821 | |||
| 1822 | |||
| 1823 | |||
| 1824 | // end tags | ||
| 1825 | while (stack != sp) { | ||
| 1826 | endTag(true); | ||
| 1827 | } | ||
| 1828 | |||
| 1829 | endTag(false); | ||
| 1830 | return; | ||
| 1831 | |||
| 1832 | case -1: | ||
| 1833 | error("eof"); | ||
| 1834 | return; | ||
| 1835 | } | ||
| 1836 | |||
| 1837 | // start tag [14] 314:1 | ||
| 1838 | if (!parseIdentifier(true)) { | ||
| 1839 | elem = recent; | ||
| 1840 | if ((ch != '>') || (elem == null)) { | ||
| 1841 | error("expected.tagname"); | ||
| 1842 | return; | ||
| 1843 | } | ||
| 1844 | } else { | ||
| 1845 | String elemStr = getString(0); | ||
| 1846 | |||
| 1847 | if (elemStr.equals("image")) { | ||
| 1848 | elemStr = "img"; | ||
| 1849 | } | ||
| 1850 | |||
| 1851 | /* determine if this element is part of the dtd. */ | ||
| 1852 | |||
| 1853 | if (!dtd.elementExists(elemStr)) { | ||
| 1854 | // parseInvalidTag(); | ||
| 1855 | error("tag.unrecognized ", elemStr); | ||
| 1856 | elem = dtd.getElement("unknown"); | ||
| 1857 | elem.name = elemStr; | ||
| 1858 | unknown = true; | ||
| 1859 | } else { | ||
| 1860 | elem = dtd.getElement(elemStr); | ||
| 1861 | } | ||
| 1862 | } | ||
| 1863 | |||
| 1864 | // Parse attributes | ||
| 1865 | parseAttributeSpecificationList(elem); | ||
| 1866 | |||
| 1867 | switch (ch) { | ||
| 1868 | case '/': | ||
| 1869 | net = true; | ||
| 1870 | case '>': | ||
| 1871 | ch = readCh(); | ||
| 1872 | if (ch == '>' && net) { | ||
| 1873 | ch = readCh(); | ||
| 1874 | } | ||
| 1875 | case '<': | ||
| 1876 | break; | ||
| 1877 | |||
| 1878 | default: | ||
| 1879 | error("expected", "'>'"); | ||
| 1880 | break; | ||
| 1881 | } | ||
| 1882 | |||
| 1883 | if (!strict) { | ||
| 1884 | if (elem.getName().equals("script")) { | ||
| 1885 | error("javascript.unsupported"); | ||
| 1886 | } | ||
| 1887 | } | ||
| 1888 | |||
| 1889 | // ignore RE after start tag | ||
| 1890 | // | ||
| 1891 | if (!elem.isEmpty()) { | ||
| 1892 | if (ch == '\n') { | ||
| 1893 | ln++; | ||
| 1894 | lfCount++; | ||
| 1895 | ch = readCh(); | ||
| 1896 | } else if (ch == '\r') { | ||
| 1897 | ln++; | ||
| 1898 | if ((ch = readCh()) == '\n') { | ||
| 1899 | ch = readCh(); | ||
| 1900 | crlfCount++; | ||
| 1901 | } | ||
| 1902 | else { | ||
| 1903 | crCount++; | ||
| 1904 | } | ||
| 1905 | } | ||
| 1906 | } | ||
| 1907 | |||
| 1908 | // ensure a legal context for the tag | ||
| 1909 | TagElement tag = makeTag(elem, false); | ||
| 1910 | |||
| 1911 | |||
| 1912 | /** In dealing with forms, we have decided to treat | ||
| 1913 | them as legal in any context. Also, even though | ||
| 1914 | they do have a start and an end tag, we will | ||
| 1915 | not put this tag on the stack. This is to deal | ||
| 1916 | several pages in the web oasis that choose to | ||
| 1917 | start and end forms in any possible location. **/ | ||
| 1918 | |||
| 1919 | /* | ||
| 1920 | if (!strict && elem.getName().equals("form")) { | ||
| 1921 | if (lastFormSent == null) { | ||
| 1922 | lastFormSent = tag; | ||
| 1923 | } else { | ||
| 1924 | handleEndTag(lastFormSent); | ||
| 1925 | lastFormSent = tag; | ||
| 1926 | } | ||
| 1927 | } else { | ||
| 1928 | */ | ||
| 1929 | // Smlly, if a tag is unknown, we will apply | ||
| 1930 | // no legalTagContext logic to it. | ||
| 1931 | // | ||
| 1932 | if (!unknown) { | ||
| 1933 | legalTagContext(tag); | ||
| 1934 | |||
| 1935 | // If skip tag is true, this implies that | ||
| 1936 | // the tag was illegal and that the error | ||
| 1937 | // recovery strategy adopted is to ignore | ||
| 1938 | // the tag. | ||
| 1939 | if (!strict && skipTag) { | ||
| 1940 | skipTag = false; | ||
| 1941 | return; | ||
| 1942 | } | ||
| 1943 | } | ||
| 1944 | /* | ||
| 1945 | } | ||
| 1946 | */ | ||
| 1947 | |||
| 1948 | startTag(tag); | ||
| 1949 | |||
| 1950 | if (!elem.isEmpty()) { | ||
| 1951 | switch (elem.getType()) { | ||
| 1952 | case CDATA: | ||
| 1953 | parseLiteral(false); | ||
| 1954 | break; | ||
| 1955 | case RCDATA: | ||
| 1956 | parseLiteral(true); | ||
| 1957 | break; | ||
| 1958 | default: | ||
| 1959 | if (stack != null) { | ||
| 1960 | stack.net = net; | ||
| 1961 | } | ||
| 1962 | break; | ||
| 1963 | } | ||
| 1964 | } | ||
| 1965 | } | ||
| 1966 | |||
| 1967 | private static final String START_COMMENT = "<!--"; | ||
| 1968 | private static final String END_COMMENT = "-->"; | ||
| 1969 | private static final char[] SCRIPT_END_TAG = "</script>".toCharArray(); | ||
| 1970 | private static final char[] SCRIPT_END_TAG_UPPER_CASE = | ||
| 1971 | "</SCRIPT>".toCharArray(); | ||
| 1972 | |||
| 1973 | void parseScript() throws IOException { | ||
| 1974 | char[] charsToAdd = new char[SCRIPT_END_TAG.length]; | ||
| 1975 | |||
| 1976 | /* Here, ch should be the first character after <script> */ | ||
| 1977 | while (true) { | ||
| 1978 | int i = 0; | ||
| 1979 | while (i < SCRIPT_END_TAG.length | ||
| 1980 | && (SCRIPT_END_TAG[i] == ch | ||
| 1981 | || SCRIPT_END_TAG_UPPER_CASE[i] == ch)) { | ||
| 1982 | charsToAdd[i] = (char) ch; | ||
| 1983 | ch = readCh(); | ||
| 1984 | i++; | ||
| 1985 | } | ||
| 1986 | if (i == SCRIPT_END_TAG.length) { | ||
| 1987 | |||
| 1988 | /* '</script>' tag detected */ | ||
| 1989 | /* Here, ch == '>' */ | ||
| 1990 | ch = readCh(); | ||
| 1991 | /* Here, ch == the first character after </script> */ | ||
| 1992 | return; | ||
| 1993 | } else { | ||
| 1994 | |||
| 1995 | /* To account for extra read()'s that happened */ | ||
| 1996 | for (int j = 0; j < i; j++) { | ||
| 1997 | addString(charsToAdd[j]); | ||
| 1998 | } | ||
| 1999 | |||
| 2000 | switch (ch) { | ||
| 2001 | case -1: | ||
| 2002 | error("eof.script"); | ||
| 2003 | return; | ||
| 2004 | case '\n': | ||
| 2005 | ln++; | ||
| 2006 | ch = readCh(); | ||
| 2007 | lfCount++; | ||
| 2008 | addString('\n'); | ||
| 2009 | break; | ||
| 2010 | case '\r': | ||
| 2011 | ln++; | ||
| 2012 | if ((ch = readCh()) == '\n') { | ||
| 2013 | ch = readCh(); | ||
| 2014 | crlfCount++; | ||
| 2015 | } else { | ||
| 2016 | crCount++; | ||
| 2017 | } | ||
| 2018 | addString('\n'); | ||
| 2019 | break; | ||
| 2020 | default: | ||
| 2021 | addString(ch); | ||
| 2022 | ch = readCh(); | ||
| 2023 | break; | ||
| 2024 | } // switch | ||
| 2025 | } | ||
| 2026 | } // while | ||
| 2027 | } | ||
| 2028 | |||
| 2029 | /** | ||
| 2030 | * Parse Content. [24] 320:1 | ||
| 2031 | */ | ||
| 2032 | void parseContent() throws IOException { | ||
| 2033 | Thread curThread = Thread.currentThread(); | ||
| 2034 | |||
| 2035 | for (;;) { | ||
| 2036 | if (curThread.isInterrupted()) { | ||
| 2037 | curThread.interrupt(); // resignal the interrupt | ||
| 2038 | break; | ||
| 2039 | } | ||
| 2040 | |||
| 2041 | int c = ch; | ||
| 2042 | currentBlockStartPos = currentPosition; | ||
| 2043 | |||
| 2044 | if (recent == dtd.script) { // means: if after starting <script> tag | ||
| 2045 | |||
| 2046 | /* Here, ch has to be the first character after <script> */ | ||
| 2047 | parseScript(); | ||
| 2048 | last = makeTag(dtd.getElement("comment"), true); | ||
| 2049 | |||
| 2050 | /* Remove leading and trailing HTML comment declarations */ | ||
| 2051 | String str = new String(getChars(0)).trim(); | ||
| 2052 | int minLength = START_COMMENT.length() + END_COMMENT.length(); | ||
| 2053 | if (str.startsWith(START_COMMENT) && str.endsWith(END_COMMENT) | ||
| 2054 | && str.length() >= (minLength)) { | ||
| 2055 | str = str.substring(START_COMMENT.length(), | ||
| 2056 | str.length() - END_COMMENT.length()); | ||
| 2057 | } | ||
| 2058 | |||
| 2059 | /* Handle resulting chars as comment */ | ||
| 2060 | handleComment(str.toCharArray()); | ||
| 2061 | endTag(false); | ||
| 2062 | lastBlockStartPos = currentPosition; | ||
| 2063 | } else { | ||
| 2064 | switch (c) { | ||
| 2065 | case '<': | ||
| 2066 | parseTag(); | ||
| 2067 | lastBlockStartPos = currentPosition; | ||
| 2068 | continue; | ||
| 2069 | |||
| 2070 | case '/': | ||
| 2071 | ch = readCh(); | ||
| 2072 | if ((stack != null) && stack.net) { | ||
| 2073 | // null end tag. | ||
| 2074 | endTag(false); | ||
| 2075 | continue; | ||
| 2076 | } | ||
| 2077 | break; | ||
| 2078 | |||
| 2079 | case -1: | ||
| 2080 | return; | ||
| 2081 | |||
| 2082 | case '&': | ||
| 2083 | if (textpos == 0) { | ||
| 2084 | if (!legalElementContext(dtd.pcdata)) { | ||
| 2085 | error("unexpected.pcdata"); | ||
| 2086 | } | ||
| 2087 | if (last.breaksFlow()) { | ||
| 2088 | space = false; | ||
| 2089 | } | ||
| 2090 | } | ||
| 2091 | char data[] = parseEntityReference(); | ||
| 2092 | if (textpos + data.length + 1 > text.length) { | ||
| 2093 | char newtext[] = new char[Math.max(textpos + data.length + 128, text.length * 2)]; | ||
| 2094 | System.arraycopy(text, 0, newtext, 0, text.length); | ||
| 2095 | text = newtext; | ||
| 2096 | } | ||
| 2097 | if (space) { | ||
| 2098 | space = false; | ||
| 2099 | text[textpos++] = ' '; | ||
| 2100 | } | ||
| 2101 | System.arraycopy(data, 0, text, textpos, data.length); | ||
| 2102 | textpos += data.length; | ||
| 2103 | ignoreSpace = false; | ||
| 2104 | continue; | ||
| 2105 | |||
| 2106 | case '\n': | ||
| 2107 | ln++; | ||
| 2108 | lfCount++; | ||
| 2109 | ch = readCh(); | ||
| 2110 | if ((stack != null) && stack.pre) { | ||
| 2111 | break; | ||
| 2112 | } | ||
| 2113 | if (textpos == 0) { | ||
| 2114 | lastBlockStartPos = currentPosition; | ||
| 2115 | } | ||
| 2116 | if (!ignoreSpace) { | ||
| 2117 | space = true; | ||
| 2118 | } | ||
| 2119 | continue; | ||
| 2120 | |||
| 2121 | case '\r': | ||
| 2122 | ln++; | ||
| 2123 | c = '\n'; | ||
| 2124 | if ((ch = readCh()) == '\n') { | ||
| 2125 | ch = readCh(); | ||
| 2126 | crlfCount++; | ||
| 2127 | } | ||
| 2128 | else { | ||
| 2129 | crCount++; | ||
| 2130 | } | ||
| 2131 | if ((stack != null) && stack.pre) { | ||
| 2132 | break; | ||
| 2133 | } | ||
| 2134 | if (textpos == 0) { | ||
| 2135 | lastBlockStartPos = currentPosition; | ||
| 2136 | } | ||
| 2137 | if (!ignoreSpace) { | ||
| 2138 | space = true; | ||
| 2139 | } | ||
| 2140 | continue; | ||
| 2141 | |||
| 2142 | |||
| 2143 | case '\t': | ||
| 2144 | case ' ': | ||
| 2145 | ch = readCh(); | ||
| 2146 | if ((stack != null) && stack.pre) { | ||
| 2147 | break; | ||
| 2148 | } | ||
| 2149 | if (textpos == 0) { | ||
| 2150 | lastBlockStartPos = currentPosition; | ||
| 2151 | } | ||
| 2152 | if (!ignoreSpace) { | ||
| 2153 | space = true; | ||
| 2154 | } | ||
| 2155 | continue; | ||
| 2156 | |||
| 2157 | default: | ||
| 2158 | if (textpos == 0) { | ||
| 2159 | if (!legalElementContext(dtd.pcdata)) { | ||
| 2160 | error("unexpected.pcdata"); | ||
| 2161 | } | ||
| 2162 | if (last.breaksFlow()) { | ||
| 2163 | space = false; | ||
| 2164 | } | ||
| 2165 | } | ||
| 2166 | ch = readCh(); | ||
| 2167 | break; | ||
| 2168 | } | ||
| 2169 | } | ||
| 2170 | |||
| 2171 | // enlarge buffer if needed | ||
| 2172 | if (textpos + 2 > text.length) { | ||
| 2173 | char newtext[] = new char[text.length + 128]; | ||
| 2174 | System.arraycopy(text, 0, newtext, 0, text.length); | ||
| 2175 | text = newtext; | ||
| 2176 | } | ||
| 2177 | |||
| 2178 | // output pending space | ||
| 2179 | if (space) { | ||
| 2180 | if (textpos == 0) { | ||
| 2181 | lastBlockStartPos--; | ||
| 2182 | } | ||
| 2183 | text[textpos++] = ' '; | ||
| 2184 | space = false; | ||
| 2185 | } | ||
| 2186 | text[textpos++] = (char)c; | ||
| 2187 | ignoreSpace = false; | ||
| 2188 | } | ||
| 2189 | } | ||
| 2190 | |||
| 2191 | /** | ||
| 2192 | * Returns the end of line string. This will return the end of line | ||
| 2193 | * string that has been encountered the most, one of \r, \n or \r\n. | ||
| 2194 | */ | ||
| 2195 | String getEndOfLineString() { | ||
| 2196 | if (crlfCount >= crCount) { | ||
| 2197 | if (lfCount >= crlfCount) { | ||
| 2198 | return "\n"; | ||
| 2199 | } | ||
| 2200 | else { | ||
| 2201 | return "\r\n"; | ||
| 2202 | } | ||
| 2203 | } | ||
| 2204 | else { | ||
| 2205 | if (crCount > lfCount) { | ||
| 2206 | return "\r"; | ||
| 2207 | } | ||
| 2208 | else { | ||
| 2209 | return "\n"; | ||
| 2210 | } | ||
| 2211 | } | ||
| 2212 | } | ||
| 2213 | |||
| 2214 | /** | ||
| 2215 | * Parse an HTML stream, given a DTD. | ||
| 2216 | */ | ||
| 2217 | public synchronized void parse(Reader in) throws IOException { | ||
| 2218 | this.in = in; | ||
| 2219 | |||
| 2220 | this.ln = 1; | ||
| 2221 | |||
| 2222 | seenHtml = false; | ||
| 2223 | seenHead = false; | ||
| 2224 | seenBody = false; | ||
| 2225 | |||
| 2226 | crCount = lfCount = crlfCount = 0; | ||
| 2227 | |||
| 2228 | try { | ||
| 2229 | ch = readCh(); | ||
| 2230 | text = new char[1024]; | ||
| 2231 | str = new char[128]; | ||
| 2232 | |||
| 2233 | parseContent(); | ||
| 2234 | // NOTE: interruption may have occurred. Control flows out | ||
| 2235 | // of here normally. | ||
| 2236 | while (stack != null) { | ||
| 2237 | endTag(true); | ||
| 2238 | } | ||
| 2239 | in.close(); | ||
| 2240 | } catch (IOException e) { | ||
| 2241 | errorContext(); | ||
| 2242 | error("ioexception"); | ||
| 2243 | throw e; | ||
| 2244 | } catch (Exception e) { | ||
| 2245 | errorContext(); | ||
| 2246 | error("exception", e.getClass().getName(), e.getMessage()); | ||
| 2247 | e.printStackTrace(); | ||
| 2248 | } catch (ThreadDeath e) { | ||
| 2249 | errorContext(); | ||
| 2250 | error("terminated"); | ||
| 2251 | e.printStackTrace(); | ||
| 2252 | throw e; | ||
| 2253 | } finally { | ||
| 2254 | for (; stack != null ; stack = stack.next) { | ||
| 2255 | handleEndTag(stack.tag); | ||
| 2256 | } | ||
| 2257 | |||
| 2258 | text = null; | ||
| 2259 | str = null; | ||
| 2260 | } | ||
| 2261 | |||
| 2262 | } | ||
| 2263 | |||
| 2264 | |||
| 2265 | /* | ||
| 2266 | * Input cache. This is much faster than calling down to a synchronized | ||
| 2267 | * method of BufferedReader for each byte. Measurements done 5/30/97 | ||
| 2268 | * show that there's no point in having a bigger buffer: Increasing | ||
| 2269 | * the buffer to 8192 had no measurable impact for a program discarding | ||
| 2270 | * one character at a time (reading from an http URL to a local machine). | ||
| 2271 | * NOTE: If the current encoding is bogus, and we read too much | ||
| 2272 | * (past the content-type) we may suffer a MalformedInputException. For | ||
| 2273 | * this reason the initial size is 1 and when the body is encountered the | ||
| 2274 | * size is adjusted to 256. | ||
| 2275 | */ | ||
| 2276 | private char buf[] = new char[1]; | ||
| 2277 | private int pos; | ||
| 2278 | private int len; | ||
| 2279 | /* | ||
| 2280 | tracks position relative to the beginning of the | ||
| 2281 | document. | ||
| 2282 | */ | ||
| 2283 | private int currentPosition; | ||
| 2284 | |||
| 2285 | |||
| 2286 | private final int readCh() throws IOException { | ||
| 2287 | |||
| 2288 | if (pos >= len) { | ||
| 2289 | |||
| 2290 | // This loop allows us to ignore interrupts if the flag | ||
| 2291 | // says so | ||
| 2292 | for (;;) { | ||
| 2293 | try { | ||
| 2294 | len = in.read(buf); | ||
| 2295 | break; | ||
| 2296 | } catch (InterruptedIOException ex) { | ||
| 2297 | throw ex; | ||
| 2298 | } | ||
| 2299 | } | ||
| 2300 | |||
| 2301 | if (len <= 0) { | ||
| 2302 | return -1; // eof | ||
| 2303 | } | ||
| 2304 | pos = 0; | ||
| 2305 | } | ||
| 2306 | ++currentPosition; | ||
| 2307 | |||
| 2308 | return buf[pos++]; | ||
| 2309 | } | ||
| 2310 | |||
| 2311 | |||
| 2312 | protected int getCurrentPos() { | ||
| 2313 | return currentPosition; | ||
| 2314 | } | ||
| 2315 | } | ||