Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: master
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 1054 lines (987 sloc) 34.495 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054
<?php
/**
* base include file for SimpleTest
* @package SimpleTest
* @subpackage WebTester
* @version $Id$
*/

/**#@+
* Lexer mode stack constants
*/
foreach (array('LEXER_ENTER', 'LEXER_MATCHED',
                'LEXER_UNMATCHED', 'LEXER_EXIT',
                'LEXER_SPECIAL') as $i => $constant) {
    if (! defined($constant)) {
        define($constant, $i + 1);
    }
}
/**#@-*/

/**
* Compounded regular expression. Any of
* the contained patterns could match and
* when one does, it's label is returned.
* @package SimpleTest
* @subpackage WebTester
*/
class ParallelRegex {
    private $patterns;
    private $labels;
    private $regex;
    private $case;

    /**
* Constructor. Starts with no patterns.
* @param boolean $case True for case sensitive, false
* for insensitive.
* @access public
*/
    function __construct($case) {
        $this->case = $case;
        $this->patterns = array();
        $this->labels = array();
        $this->regex = null;
    }

    /**
* Adds a pattern with an optional label.
* @param string $pattern Perl style regex, but ( and )
* lose the usual meaning.
* @param string $label Label of regex to be returned
* on a match.
* @access public
*/
    function addPattern($pattern, $label = true) {
        $count = count($this->patterns);
        $this->patterns[$count] = $pattern;
        $this->labels[$count] = $label;
        $this->regex = null;
    }

    /**
* Attempts to match all patterns at once against
* a string.
* @param string $subject String to match against.
* @param string $match First matched portion of
* subject.
* @return boolean True on success.
* @access public
*/
    function match($subject, &$match) {
        if (count($this->patterns) == 0) {
            return false;
        }
        if (! preg_match($this->getCompoundedRegex(), $subject, $matches)) {
            $match = '';
            return false;
        }
        $match = $matches[0];
        for ($i = 1; $i < count($matches); $i++) {
            if ($matches[$i]) {
                return $this->labels[$i - 1];
            }
        }
        return true;
    }

    /**
* Compounds the patterns into a single
* regular expression separated with the
* "or" operator. Caches the regex.
* Will automatically escape (, ) and / tokens.
* @param array $patterns List of patterns in order.
* @access private
*/
    protected function getCompoundedRegex() {
        if ($this->regex == null) {
            for ($i = 0, $count = count($this->patterns); $i < $count; $i++) {
                $this->patterns[$i] = '(' . str_replace(
                        array('/', '(', ')'),
                        array('\/', '\(', '\)'),
                        $this->patterns[$i]) . ')';
            }
            $this->regex = "/" . implode("|", $this->patterns) . "/" . $this->getPerlMatchingFlags();
        }
        return $this->regex;
    }

    /**
* Accessor for perl regex mode flags to use.
* @return string Perl regex flags.
* @access private
*/
    protected function getPerlMatchingFlags() {
        return ($this->case ? "msS" : "msSi");
    }
}

/**
* States for a stack machine.
* @package SimpleTest
* @subpackage WebTester
*/
class SimpleStateStack {
    private $stack;

    /**
* Constructor. Starts in named state.
* @param string $start Starting state name.
* @access public
*/
    function __construct($start) {
        $this->stack = array($start);
    }

    /**
* Accessor for current state.
* @return string State.
* @access public
*/
    function getCurrent() {
        return $this->stack[count($this->stack) - 1];
    }

    /**
* Adds a state to the stack and sets it
* to be the current state.
* @param string $state New state.
* @access public
*/
    function enter($state) {
        array_push($this->stack, $state);
    }

    /**
* Leaves the current state and reverts
* to the previous one.
* @return boolean False if we drop off
* the bottom of the list.
* @access public
*/
    function leave() {
        if (count($this->stack) == 1) {
            return false;
        }
        array_pop($this->stack);
        return true;
    }
}

/**
* Accepts text and breaks it into tokens.
* Some optimisation to make the sure the
* content is only scanned by the PHP regex
* parser once. Lexer modes must not start
* with leading underscores.
* @package SimpleTest
* @subpackage WebTester
*/
class SimpleLexer {
    private $regexes;
    private $parser;
    private $mode;
    private $mode_handlers;
    private $case;

    /**
* Sets up the lexer in case insensitive matching
* by default.
* @param SimpleSaxParser $parser Handling strategy by
* reference.
* @param string $start Starting handler.
* @param boolean $case True for case sensitive.
* @access public
*/
    function __construct($parser, $start = "accept", $case = false) {
        $this->case = $case;
        $this->regexes = array();
        $this->parser = $parser;
        $this->mode = new SimpleStateStack($start);
        $this->mode_handlers = array($start => $start);
    }

    /**
* Adds a token search pattern for a particular
* parsing mode. The pattern does not change the
* current mode.
* @param string $pattern Perl style regex, but ( and )
* lose the usual meaning.
* @param string $mode Should only apply this
* pattern when dealing with
* this type of input.
* @access public
*/
    function addPattern($pattern, $mode = "accept") {
        if (! isset($this->regexes[$mode])) {
            $this->regexes[$mode] = new ParallelRegex($this->case);
        }
        $this->regexes[$mode]->addPattern($pattern);
        if (! isset($this->mode_handlers[$mode])) {
            $this->mode_handlers[$mode] = $mode;
        }
    }

    /**
* Adds a pattern that will enter a new parsing
* mode. Useful for entering parenthesis, strings,
* tags, etc.
* @param string $pattern Perl style regex, but ( and )
* lose the usual meaning.
* @param string $mode Should only apply this
* pattern when dealing with
* this type of input.
* @param string $new_mode Change parsing to this new
* nested mode.
* @access public
*/
    function addEntryPattern($pattern, $mode, $new_mode) {
        if (! isset($this->regexes[$mode])) {
            $this->regexes[$mode] = new ParallelRegex($this->case);
        }
        $this->regexes[$mode]->addPattern($pattern, $new_mode);
        if (! isset($this->mode_handlers[$new_mode])) {
            $this->mode_handlers[$new_mode] = $new_mode;
        }
    }

    /**
* Adds a pattern that will exit the current mode
* and re-enter the previous one.
* @param string $pattern Perl style regex, but ( and )
* lose the usual meaning.
* @param string $mode Mode to leave.
* @access public
*/
    function addExitPattern($pattern, $mode) {
        if (! isset($this->regexes[$mode])) {
            $this->regexes[$mode] = new ParallelRegex($this->case);
        }
        $this->regexes[$mode]->addPattern($pattern, "__exit");
        if (! isset($this->mode_handlers[$mode])) {
            $this->mode_handlers[$mode] = $mode;
        }
    }

    /**
* Adds a pattern that has a special mode. Acts as an entry
* and exit pattern in one go, effectively calling a special
* parser handler for this token only.
* @param string $pattern Perl style regex, but ( and )
* lose the usual meaning.
* @param string $mode Should only apply this
* pattern when dealing with
* this type of input.
* @param string $special Use this mode for this one token.
* @access public
*/
    function addSpecialPattern($pattern, $mode, $special) {
        if (! isset($this->regexes[$mode])) {
            $this->regexes[$mode] = new ParallelRegex($this->case);
        }
        $this->regexes[$mode]->addPattern($pattern, "_$special");
        if (! isset($this->mode_handlers[$special])) {
            $this->mode_handlers[$special] = $special;
        }
    }

    /**
* Adds a mapping from a mode to another handler.
* @param string $mode Mode to be remapped.
* @param string $handler New target handler.
* @access public
*/
    function mapHandler($mode, $handler) {
        $this->mode_handlers[$mode] = $handler;
    }

    /**
* Splits the page text into tokens. Will fail
* if the handlers report an error or if no
* content is consumed. If successful then each
* unparsed and parsed token invokes a call to the
* held listener.
* @param string $raw Raw HTML text.
* @return boolean True on success, else false.
* @access public
*/
    function parse($raw) {
        if (! isset($this->parser)) {
            return false;
        }
        $length = strlen($raw);
        while (is_array($parsed = $this->reduce($raw))) {
            list($raw, $unmatched, $matched, $mode) = $parsed;
            if (! $this->dispatchTokens($unmatched, $matched, $mode)) {
                return false;
            }
            if ($raw === '') {
                return true;
            }
            if (strlen($raw) == $length) {
                return false;
            }
            $length = strlen($raw);
        }
        if (! $parsed) {
            return false;
        }
        return $this->invokeParser($raw, LEXER_UNMATCHED);
    }

    /**
* Sends the matched token and any leading unmatched
* text to the parser changing the lexer to a new
* mode if one is listed.
* @param string $unmatched Unmatched leading portion.
* @param string $matched Actual token match.
* @param string $mode Mode after match. A boolean
* false mode causes no change.
* @return boolean False if there was any error
* from the parser.
* @access private
*/
    protected function dispatchTokens($unmatched, $matched, $mode = false) {
        if (! $this->invokeParser($unmatched, LEXER_UNMATCHED)) {
            return false;
        }
        if (is_bool($mode)) {
            return $this->invokeParser($matched, LEXER_MATCHED);
        }
        if ($this->isModeEnd($mode)) {
            if (! $this->invokeParser($matched, LEXER_EXIT)) {
                return false;
            }
            return $this->mode->leave();
        }
        if ($this->isSpecialMode($mode)) {
            $this->mode->enter($this->decodeSpecial($mode));
            if (! $this->invokeParser($matched, LEXER_SPECIAL)) {
                return false;
            }
            return $this->mode->leave();
        }
        $this->mode->enter($mode);
        return $this->invokeParser($matched, LEXER_ENTER);
    }

    /**
* Tests to see if the new mode is actually to leave
* the current mode and pop an item from the matching
* mode stack.
* @param string $mode Mode to test.
* @return boolean True if this is the exit mode.
* @access private
*/
    protected function isModeEnd($mode) {
        return ($mode === "__exit");
    }

    /**
* Test to see if the mode is one where this mode
* is entered for this token only and automatically
* leaves immediately afterwoods.
* @param string $mode Mode to test.
* @return boolean True if this is the exit mode.
* @access private
*/
    protected function isSpecialMode($mode) {
        return (strncmp($mode, "_", 1) == 0);
    }

    /**
* Strips the magic underscore marking single token
* modes.
* @param string $mode Mode to decode.
* @return string Underlying mode name.
* @access private
*/
    protected function decodeSpecial($mode) {
        return substr($mode, 1);
    }

    /**
* Calls the parser method named after the current
* mode. Empty content will be ignored. The lexer
* has a parser handler for each mode in the lexer.
* @param string $content Text parsed.
* @param boolean $is_match Token is recognised rather
* than unparsed data.
* @access private
*/
    protected function invokeParser($content, $is_match) {
        if (($content === '') || ($content === false)) {
            return true;
        }
        $handler = $this->mode_handlers[$this->mode->getCurrent()];
        return $this->parser->$handler($content, $is_match);
    }

    /**
* Tries to match a chunk of text and if successful
* removes the recognised chunk and any leading
* unparsed data. Empty strings will not be matched.
* @param string $raw The subject to parse. This is the
* content that will be eaten.
* @return array/boolean Three item list of unparsed
* content followed by the
* recognised token and finally the
* action the parser is to take.
* True if no match, false if there
* is a parsing error.
* @access private
*/
    protected function reduce($raw) {
        if ($action = $this->regexes[$this->mode->getCurrent()]->match($raw, $match)) {
            $unparsed_character_count = strpos($raw, $match);
            $unparsed = substr($raw, 0, $unparsed_character_count);
            $raw = substr($raw, $unparsed_character_count + strlen($match));
            return array($raw, $unparsed, $match, $action);
        }
        return true;
    }
}

/**
* Breaks HTML into SAX events.
* @package SimpleTest
* @subpackage WebTester
*/
class SimpleHtmlLexer extends SimpleLexer {

    /**
* Sets up the lexer with case insensitive matching
* and adds the HTML handlers.
* @param SimpleSaxParser $parser Handling strategy by
* reference.
* @access public
*/
    function __construct($parser) {
        parent::__construct($parser, 'text');
        $this->mapHandler('text', 'acceptTextToken');
        $this->addSkipping();
        foreach ($this->getParsedTags() as $tag) {
            $this->addTag($tag);
        }
        $this->addInTagTokens();
    }

    /**
* List of parsed tags. Others are ignored.
* @return array List of searched for tags.
* @access private
*/
    protected function getParsedTags() {
        return array('a', 'base', 'title', 'form', 'input', 'button', 'textarea', 'select',
                'option', 'frameset', 'frame', 'label');
    }

    /**
* The lexer has to skip certain sections such
* as server code, client code and styles.
* @access private
*/
    protected function addSkipping() {
        $this->mapHandler('css', 'ignore');
        $this->addEntryPattern('<style', 'text', 'css');
        $this->addExitPattern('</style>', 'css');
        $this->mapHandler('js', 'ignore');
        $this->addEntryPattern('<script', 'text', 'js');
        $this->addExitPattern('</script>', 'js');
        $this->mapHandler('comment', 'ignore');
        $this->addEntryPattern('<!--', 'text', 'comment');
        $this->addExitPattern('-->', 'comment');
    }

    /**
* Pattern matches to start and end a tag.
* @param string $tag Name of tag to scan for.
* @access private
*/
    protected function addTag($tag) {
        $this->addSpecialPattern("</$tag>", 'text', 'acceptEndToken');
        $this->addEntryPattern("<$tag", 'text', 'tag');
    }

    /**
* Pattern matches to parse the inside of a tag
* including the attributes and their quoting.
* @access private
*/
    protected function addInTagTokens() {
        $this->mapHandler('tag', 'acceptStartToken');
        $this->addSpecialPattern('\s+', 'tag', 'ignore');
        $this->addAttributeTokens();
        $this->addExitPattern('/>', 'tag');
        $this->addExitPattern('>', 'tag');
    }

    /**
* Matches attributes that are either single quoted,
* double quoted or unquoted.
* @access private
*/
    protected function addAttributeTokens() {
        $this->mapHandler('dq_attribute', 'acceptAttributeToken');
        $this->addEntryPattern('=\s*"', 'tag', 'dq_attribute');
        $this->addPattern("\\\\\"", 'dq_attribute');
        $this->addExitPattern('"', 'dq_attribute');
        $this->mapHandler('sq_attribute', 'acceptAttributeToken');
        $this->addEntryPattern("=\s*'", 'tag', 'sq_attribute');
        $this->addPattern("\\\\'", 'sq_attribute');
        $this->addExitPattern("'", 'sq_attribute');
        $this->mapHandler('uq_attribute', 'acceptAttributeToken');
        $this->addSpecialPattern('=\s*[^>\s]*', 'tag', 'uq_attribute');
    }
}

/**
* Converts HTML tokens into selected SAX events.
* @package SimpleTest
* @subpackage WebTester
*/
class SimpleHtmlSaxParser {
    private $lexer;
    private $listener;
    private $tag;
    private $attributes;
    private $current_attribute;

    /**
* Sets the listener.
* @param SimplePhpPageBuilder $listener SAX event handler.
* @access public
*/
    function __construct($listener) {
        $this->listener = $listener;
        $this->lexer = $this->createLexer($this);
        $this->tag = '';
        $this->attributes = array();
        $this->current_attribute = '';
    }

    /**
* Runs the content through the lexer which
* should call back to the acceptors.
* @param string $raw Page text to parse.
* @return boolean False if parse error.
* @access public
*/
    function parse($raw) {
        return $this->lexer->parse($raw);
    }

    /**
* Sets up the matching lexer. Starts in 'text' mode.
* @param SimpleSaxParser $parser Event generator, usually $self.
* @return SimpleLexer Lexer suitable for this parser.
* @access public
*/
    static function createLexer(&$parser) {
        return new SimpleHtmlLexer($parser);
    }

    /**
* Accepts a token from the tag mode. If the
* starting element completes then the element
* is dispatched and the current attributes
* set back to empty. The element or attribute
* name is converted to lower case.
* @param string $token Incoming characters.
* @param integer $event Lexer event type.
* @return boolean False if parse error.
* @access public
*/
    function acceptStartToken($token, $event) {
        if ($event == LEXER_ENTER) {
            $this->tag = strtolower(substr($token, 1));
            return true;
        }
        if ($event == LEXER_EXIT) {
            $success = $this->listener->startElement(
                    $this->tag,
                    $this->attributes);
            $this->tag = '';
            $this->attributes = array();
            return $success;
        }
        if ($token != '=') {
            $this->current_attribute = strtolower(html_entity_decode($token, ENT_QUOTES));
            $this->attributes[$this->current_attribute] = '';
        }
        return true;
    }

    /**
* Accepts a token from the end tag mode.
* The element name is converted to lower case.
* @param string $token Incoming characters.
* @param integer $event Lexer event type.
* @return boolean False if parse error.
* @access public
*/
    function acceptEndToken($token, $event) {
        if (! preg_match('/<\/(.*)>/', $token, $matches)) {
            return false;
        }
        return $this->listener->endElement(strtolower($matches[1]));
    }

    /**
* Part of the tag data.
* @param string $token Incoming characters.
* @param integer $event Lexer event type.
* @return boolean False if parse error.
* @access public
*/
    function acceptAttributeToken($token, $event) {
        if ($this->current_attribute) {
            if ($event == LEXER_UNMATCHED) {
                $this->attributes[$this->current_attribute] .=
                        html_entity_decode($token, ENT_QUOTES);
            }
            if ($event == LEXER_SPECIAL) {
                $this->attributes[$this->current_attribute] .=
                        preg_replace('/^=\s*/' , '', html_entity_decode($token, ENT_QUOTES));
            }
        }
        return true;
    }

    /**
* A character entity.
* @param string $token Incoming characters.
* @param integer $event Lexer event type.
* @return boolean False if parse error.
* @access public
*/
    function acceptEntityToken($token, $event) {
    }

    /**
* Character data between tags regarded as
* important.
* @param string $token Incoming characters.
* @param integer $event Lexer event type.
* @return boolean False if parse error.
* @access public
*/
    function acceptTextToken($token, $event) {
        return $this->listener->addContent($token);
    }

    /**
* Incoming data to be ignored.
* @param string $token Incoming characters.
* @param integer $event Lexer event type.
* @return boolean False if parse error.
* @access public
*/
    function ignore($token, $event) {
        return true;
    }
}

/**
* SAX event handler. Maintains a list of
* open tags and dispatches them as they close.
* @package SimpleTest
* @subpackage WebTester
*/
class SimplePhpPageBuilder {
    private $tags;
    private $page;
    private $private_content_tag;
    private $open_forms = array();
    private $complete_forms = array();
    private $frameset = false;
    private $loading_frames = array();
    private $frameset_nesting_level = 0;
    private $left_over_labels = array();

    /**
* Frees up any references so as to allow the PHP garbage
* collection from unset() to work.
* @access public
*/
    function free() {
        unset($this->tags);
        unset($this->page);
        unset($this->private_content_tags);
        $this->open_forms = array();
        $this->complete_forms = array();
        $this->frameset = false;
        $this->loading_frames = array();
        $this->frameset_nesting_level = 0;
        $this->left_over_labels = array();
    }

    /**
* This builder is always available.
* @return boolean Always true.
*/
    function can() {
        return true;
    }

    /**
* Reads the raw content and send events
* into the page to be built.
* @param $response SimpleHttpResponse Fetched response.
* @return SimplePage Newly parsed page.
* @access public
*/
    function parse($response) {
        $this->tags = array();
        $this->page = $this->createPage($response);
        $parser = $this->createParser($this);
        $parser->parse($response->getContent());
        $this->acceptPageEnd();
        $page = $this->page;
        $this->free();
        return $page;
    }

    /**
* Creates an empty page.
* @return SimplePage New unparsed page.
* @access protected
*/
    protected function createPage($response) {
        return new SimplePage($response);
    }

    /**
* Creates the parser used with the builder.
* @param SimplePhpPageBuilder $listener Target of parser.
* @return SimpleSaxParser Parser to generate
* events for the builder.
* @access protected
*/
    protected function createParser(&$listener) {
        return new SimpleHtmlSaxParser($listener);
    }

    /**
* Start of element event. Opens a new tag.
* @param string $name Element name.
* @param hash $attributes Attributes without content
* are marked as true.
* @return boolean False on parse error.
* @access public
*/
    function startElement($name, $attributes) {
        $factory = new SimpleTagBuilder();
        $tag = $factory->createTag($name, $attributes);
        if (! $tag) {
            return true;
        }
        if ($tag->getTagName() == 'label') {
            $this->acceptLabelStart($tag);
            $this->openTag($tag);
            return true;
        }
        if ($tag->getTagName() == 'form') {
            $this->acceptFormStart($tag);
            return true;
        }
        if ($tag->getTagName() == 'frameset') {
            $this->acceptFramesetStart($tag);
            return true;
        }
        if ($tag->getTagName() == 'frame') {
            $this->acceptFrame($tag);
            return true;
        }
        if ($tag->isPrivateContent() && ! isset($this->private_content_tag)) {
            $this->private_content_tag = &$tag;
        }
        if ($tag->expectEndTag()) {
            $this->openTag($tag);
            return true;
        }
        $this->acceptTag($tag);
        return true;
    }

    /**
* End of element event.
* @param string $name Element name.
* @return boolean False on parse error.
* @access public
*/
    function endElement($name) {
        if ($name == 'label') {
            $this->acceptLabelEnd();
            return true;
        }
        if ($name == 'form') {
            $this->acceptFormEnd();
            return true;
        }
        if ($name == 'frameset') {
            $this->acceptFramesetEnd();
            return true;
        }
        if ($this->hasNamedTagOnOpenTagStack($name)) {
            $tag = array_pop($this->tags[$name]);
            if ($tag->isPrivateContent() && $this->private_content_tag->getTagName() == $name) {
                unset($this->private_content_tag);
            }
            $this->addContentTagToOpenTags($tag);
            $this->acceptTag($tag);
            return true;
        }
        return true;
    }

    /**
* Test to see if there are any open tags awaiting
* closure that match the tag name.
* @param string $name Element name.
* @return boolean True if any are still open.
* @access private
*/
    protected function hasNamedTagOnOpenTagStack($name) {
        return isset($this->tags[$name]) && (count($this->tags[$name]) > 0);
    }

    /**
* Unparsed, but relevant data. The data is added
* to every open tag.
* @param string $text May include unparsed tags.
* @return boolean False on parse error.
* @access public
*/
    function addContent($text) {
        if (isset($this->private_content_tag)) {
            $this->private_content_tag->addContent($text);
        } else {
            $this->addContentToAllOpenTags($text);
        }
        return true;
    }

    /**
* Any content fills all currently open tags unless it
* is part of an option tag.
* @param string $text May include unparsed tags.
* @access private
*/
    protected function addContentToAllOpenTags($text) {
        foreach (array_keys($this->tags) as $name) {
            for ($i = 0, $count = count($this->tags[$name]); $i < $count; $i++) {
                $this->tags[$name][$i]->addContent($text);
            }
        }
    }

    /**
* Parsed data in tag form. The parsed tag is added
* to every open tag. Used for adding options to select
* fields only.
* @param SimpleTag $tag Option tags only.
* @access private
*/
    protected function addContentTagToOpenTags(&$tag) {
        if ($tag->getTagName() != 'option') {
            return;
        }
        foreach (array_keys($this->tags) as $name) {
            for ($i = 0, $count = count($this->tags[$name]); $i < $count; $i++) {
                $this->tags[$name][$i]->addTag($tag);
            }
        }
    }

    /**
* Opens a tag for receiving content. Multiple tags
* will be receiving input at the same time.
* @param SimpleTag $tag New content tag.
* @access private
*/
    protected function openTag($tag) {
        $name = $tag->getTagName();
        if (! in_array($name, array_keys($this->tags))) {
            $this->tags[$name] = array();
        }
        $this->tags[$name][] = $tag;
    }

    /**
* Adds a tag to the page.
* @param SimpleTag $tag Tag to accept.
* @access public
*/
    protected function acceptTag($tag) {
        if ($tag->getTagName() == "a") {
            $this->page->addLink($tag);
        } elseif ($tag->getTagName() == "base") {
            $this->page->setBase($tag->getAttribute('href'));
        } elseif ($tag->getTagName() == "title") {
            $this->page->setTitle($tag);
        } elseif ($this->isFormElement($tag->getTagName())) {
            for ($i = 0; $i < count($this->open_forms); $i++) {
                $this->open_forms[$i]->addWidget($tag);
            }
            $this->last_widget = $tag;
        }
    }

    /**
* Opens a label for a described widget.
* @param SimpleFormTag $tag Tag to accept.
* @access public
*/
    protected function acceptLabelStart($tag) {
        $this->label = $tag;
        unset($this->last_widget);
    }

    /**
* Closes the most recently opened label.
* @access public
*/
    protected function acceptLabelEnd() {
        if (isset($this->label)) {
            if (isset($this->last_widget)) {
                $this->last_widget->setLabel($this->label->getText());
                unset($this->last_widget);
            } else {
                $this->left_over_labels[] = SimpleTestCompatibility::copy($this->label);
            }
            unset($this->label);
        }
    }

    /**
* Tests to see if a tag is a possible form
* element.
* @param string $name HTML element name.
* @return boolean True if form element.
* @access private
*/
    protected function isFormElement($name) {
        return in_array($name, array('input', 'button', 'textarea', 'select'));
    }

    /**
* Opens a form. New widgets go here.
* @param SimpleFormTag $tag Tag to accept.
* @access public
*/
    protected function acceptFormStart($tag) {
        $this->open_forms[] = new SimpleForm($tag, $this->page);
    }

    /**
* Closes the most recently opened form.
* @access public
*/
    protected function acceptFormEnd() {
        if (count($this->open_forms)) {
            $this->complete_forms[] = array_pop($this->open_forms);
        }
    }

    /**
* Opens a frameset. A frameset may contain nested
* frameset tags.
* @param SimpleFramesetTag $tag Tag to accept.
* @access public
*/
    protected function acceptFramesetStart($tag) {
        if (! $this->isLoadingFrames()) {
            $this->frameset = $tag;
        }
        $this->frameset_nesting_level++;
    }

    /**
* Closes the most recently opened frameset.
* @access public
*/
    protected function acceptFramesetEnd() {
        if ($this->isLoadingFrames()) {
            $this->frameset_nesting_level--;
        }
    }

    /**
* Takes a single frame tag and stashes it in
* the current frame set.
* @param SimpleFrameTag $tag Tag to accept.
* @access public
*/
    protected function acceptFrame($tag) {
        if ($this->isLoadingFrames()) {
            if ($tag->getAttribute('src')) {
                $this->loading_frames[] = $tag;
            }
        }
    }

    /**
* Test to see if in the middle of reading
* a frameset.
* @return boolean True if inframeset.
* @access private
*/
    protected function isLoadingFrames() {
        return $this->frameset and $this->frameset_nesting_level > 0;
    }

    /**
* Marker for end of complete page. Any work in
* progress can now be closed.
* @access public
*/
    protected function acceptPageEnd() {
        while (count($this->open_forms)) {
            $this->complete_forms[] = array_pop($this->open_forms);
        }
        foreach ($this->left_over_labels as $label) {
            for ($i = 0, $count = count($this->complete_forms); $i < $count; $i++) {
                $this->complete_forms[$i]->attachLabelBySelector(
                        new SimpleById($label->getFor()),
                        $label->getText());
            }
        }
        $this->page->setForms($this->complete_forms);
        $this->page->setFrames($this->loading_frames);
    }
}
?>
Something went wrong with that request. Please try again.