2 /* vim: set expandtab tabstop=4 shiftwidth=4: */
4 // +----------------------------------------------------------------------+
6 // +----------------------------------------------------------------------+
7 // | Copyright (c) 1997-2002 The PHP Group |
8 // +----------------------------------------------------------------------+
9 // | This source file is subject to version 2.02 of the PHP license, |
10 // | that is bundled with this package in the file LICENSE, and is |
11 // | available at through the world-wide-web at |
12 // | http://www.php.net/license/3_0.txt. |
13 // | If you did not receive a copy of the PHP license and are unable to |
14 // | obtain it through the world-wide-web, please send a note to |
15 // | license@php.net so we can mail you a copy immediately. |
16 // +----------------------------------------------------------------------+
17 // | Authors: Alexander Zhukov <alex@veresk.ru> Original port from Python |
18 // | Authors: Harry Fuecks <hfuecks@phppatterns.com> Port to PEAR + more |
19 // | Authors: Many @ Sitepointforums Advanced PHP Forums |
20 // +----------------------------------------------------------------------+
25 * Main parser components
26 * @package XML_HTMLSax
32 require_once(AT_INCLUDE_PATH.'classes/XML/XML_HTMLSax/PEAR.php');
33 if (!defined('XML_HTMLSAX')) {
34 define('XML_HTMLSAX', AT_INCLUDE_PATH . 'classes/XML/XML_HTMLSax/'); /* 'XML/' had to be removed to work. joel/ATRC */
36 require_once(XML_HTMLSAX . 'HTMLSax/XML_HTMLSax_States.php');
37 require_once(XML_HTMLSAX . 'HTMLSax/XML_HTMLSax_Decorators.php');
40 * @package XML_HTMLSax
44 class XML_HTMLSax_StateParser {
46 * Instance of user front end class to be passed to callbacks
52 * User defined object for handling elements
56 var $handler_object_element;
58 * User defined open tag handler method
62 var $handler_method_opening;
64 * User defined close tag handler method
68 var $handler_method_closing;
70 * User defined object for handling data in elements
74 var $handler_object_data;
76 * User defined data handler method
80 var $handler_method_data;
82 * User defined object for handling processing instructions
86 var $handler_object_pi;
88 * User defined processing instruction handler method
92 var $handler_method_pi;
94 * User defined object for handling JSP/ASP tags
98 var $handler_object_jasp;
100 * User defined JSP/ASP handler method
104 var $handler_method_jasp;
106 * User defined object for handling XML escapes
110 var $handler_object_escape;
112 * User defined XML escape handler method
116 var $handler_method_escape;
118 * User defined handler object or NullHandler
122 var $handler_default;
124 * Parser options determining parsing behavior
128 var $parser_options = array();
130 * XML document being parsed
136 * Position in XML document relative to start (0)
142 * Length of the XML document in characters
148 * Array of state objects
152 var $State = array();
155 * Constructs XML_HTMLSax_StateParser setting up states
156 * @var XML_HTMLSax instance of user front end class
159 function XML_HTMLSax_StateParser (& $htmlsax) {
160 $this->htmlsax = & $htmlsax;
161 $this->State[XML_HTMLSAX_STATE_START] = new XML_HTMLSax_StartingState();
163 $this->State[XML_HTMLSAX_STATE_CLOSING_TAG] = new XML_HTMLSax_ClosingTagState();
164 $this->State[XML_HTMLSAX_STATE_TAG] = new XML_HTMLSax_TagState();
165 $this->State[XML_HTMLSAX_STATE_OPENING_TAG] = new XML_HTMLSax_OpeningTagState();
167 $this->State[XML_HTMLSAX_STATE_PI] = new XML_HTMLSax_PiState();
168 $this->State[XML_HTMLSAX_STATE_JASP] = new XML_HTMLSax_JaspState();
169 $this->State[XML_HTMLSAX_STATE_ESCAPE] = new XML_HTMLSax_EscapeState();
173 * Moves the position back one character
177 function unscanCharacter() {
178 $this->position -= 1;
182 * Moves the position forward one character
186 function ignoreCharacter() {
187 $this->position += 1;
191 * Returns the next character from the XML document or void if at end
195 function scanCharacter() {
196 if ($this->position < $this->length) {
197 return $this->rawtext{$this->position++};
202 * Returns a string from the current position to the next occurance
203 * of the supplied string
204 * @param string string to search until
208 function scanUntilString($string) {
209 $start = $this->position;
210 $this->position = @strpos($this->rawtext, $string, $start);
211 if ($this->position === FALSE) {
212 $this->position = $this->length;
214 return substr($this->rawtext, $start, $this->position - $start);
218 * Returns a string from the current position until the first instance of
219 * one of the characters in the supplied string argument
220 * @param string string to search until
225 function scanUntilCharacters($string) {}
228 * Moves the position forward past any whitespace characters
233 function ignoreWhitespace() {}
236 * Begins the parsing operation, setting up any decorators, depending on
237 * parse options invoking _parse() to execute parsing
238 * @param string XML document to parse
242 function parse($data) {
243 if ($this->parser_options['XML_OPTION_TRIM_DATA_NODES']==1) {
244 $decorator = new XML_HTMLSax_Trim(
245 $this->handler_object_data,
246 $this->handler_method_data);
247 $this->handler_object_data =& $decorator;
248 $this->handler_method_data = 'trimData';
250 if ($this->parser_options['XML_OPTION_CASE_FOLDING']==1) {
251 $open_decor = new XML_HTMLSax_CaseFolding(
252 $this->handler_object_element,
253 $this->handler_method_opening,
254 $this->handler_method_closing);
255 $this->handler_object_element =& $open_decor;
256 $this->handler_method_opening ='foldOpen';
257 $this->handler_method_closing ='foldClose';
259 if ($this->parser_options['XML_OPTION_LINEFEED_BREAK']==1) {
260 $decorator = new XML_HTMLSax_Linefeed(
261 $this->handler_object_data,
262 $this->handler_method_data);
263 $this->handler_object_data =& $decorator;
264 $this->handler_method_data = 'breakData';
266 if ($this->parser_options['XML_OPTION_TAB_BREAK']==1) {
267 $decorator = new XML_HTMLSax_Tab(
268 $this->handler_object_data,
269 $this->handler_method_data);
270 $this->handler_object_data =& $decorator;
271 $this->handler_method_data = 'breakData';
273 if ($this->parser_options['XML_OPTION_ENTITIES_UNPARSED']==1) {
274 $decorator = new XML_HTMLSax_Entities_Unparsed(
275 $this->handler_object_data,
276 $this->handler_method_data);
277 $this->handler_object_data =& $decorator;
278 $this->handler_method_data = 'breakData';
280 if ($this->parser_options['XML_OPTION_ENTITIES_PARSED']==1) {
281 $decorator = new XML_HTMLSax_Entities_Parsed(
282 $this->handler_object_data,
283 $this->handler_method_data);
284 $this->handler_object_data =& $decorator;
285 $this->handler_method_data = 'breakData';
287 $this->rawtext = $data;
288 $this->length = strlen($data);
294 * Performs the parsing itself, delegating calls to a specific parser
296 * @param constant state object to parse with
300 function _parse($state = XML_HTMLSAX_STATE_START) {
302 $state = $this->State[$state]->parse($this);
303 } while ($state != XML_HTMLSAX_STATE_STOP &&
304 $this->position < $this->length);
309 * Parser for PHP Versions below 4.3.0. Uses a slower parsing mechanism than
310 * the equivalent PHP 4.3.0+ subclass of StateParser
311 * @package XML_HTMLSax
313 * @see XML_HTMLSax_StateParser_Gtet430
315 class XML_HTMLSax_StateParser_Lt430 extends XML_HTMLSax_StateParser {
317 * Constructs XML_HTMLSax_StateParser_Lt430 defining available
319 * @var XML_HTMLSax instance of user front end class
322 function XML_HTMLSax_StateParser_Lt430(& $htmlsax) {
323 parent::XML_HTMLSax_StateParser($htmlsax);
324 $this->parser_options['XML_OPTION_TRIM_DATA_NODES'] = 0;
325 $this->parser_options['XML_OPTION_CASE_FOLDING'] = 0;
326 $this->parser_options['XML_OPTION_LINEFEED_BREAK'] = 0;
327 $this->parser_options['XML_OPTION_TAB_BREAK'] = 0;
328 $this->parser_options['XML_OPTION_ENTITIES_PARSED'] = 0;
329 $this->parser_options['XML_OPTION_ENTITIES_UNPARSED'] = 0;
330 $this->parser_options['XML_OPTION_FULL_ESCAPES'] = 0;
334 * Returns a string from the current position until the first instance of
335 * one of the characters in the supplied string argument
336 * @param string string to search until
340 function scanUntilCharacters($string) {
341 $startpos = $this->position;
342 while ($this->position < $this->length && strpos($string, $this->rawtext{$this->position}) === FALSE) {
345 return substr($this->rawtext, $startpos, $this->position - $startpos);
349 * Moves the position forward past any whitespace characters
353 function ignoreWhitespace() {
354 while ($this->position < $this->length &&
355 strpos(" \n\r\t", $this->rawtext{$this->position}) !== FALSE) {
361 * Begins the parsing operation, setting up the unparsed XML entities
362 * decorator if necessary then delegating further work to parent
363 * @param string XML document to parse
367 function parse($data) {
368 parent::parse($data);
373 * Parser for PHP Versions equal to or greater than 4.3.0. Uses a faster
374 * parsing mechanism than the equivalent PHP < 4.3.0 subclass of StateParser
375 * @package XML_HTMLSax
377 * @see XML_HTMLSax_StateParser_Lt430
379 class XML_HTMLSax_StateParser_Gtet430 extends XML_HTMLSax_StateParser {
381 * Constructs XML_HTMLSax_StateParser_Gtet430 defining available
383 * @var XML_HTMLSax instance of user front end class
386 function XML_HTMLSax_StateParser_Gtet430(& $htmlsax) {
387 parent::XML_HTMLSax_StateParser($htmlsax);
388 $this->parser_options['XML_OPTION_TRIM_DATA_NODES'] = 0;
389 $this->parser_options['XML_OPTION_CASE_FOLDING'] = 0;
390 $this->parser_options['XML_OPTION_LINEFEED_BREAK'] = 0;
391 $this->parser_options['XML_OPTION_TAB_BREAK'] = 0;
392 $this->parser_options['XML_OPTION_ENTITIES_PARSED'] = 0;
393 $this->parser_options['XML_OPTION_ENTITIES_UNPARSED'] = 0;
394 $this->parser_options['XML_OPTION_FULL_ESCAPES'] = 0;
397 * Returns a string from the current position until the first instance of
398 * one of the characters in the supplied string argument.
399 * @param string string to search until
403 function scanUntilCharacters($string) {
404 $startpos = $this->position;
405 $length = strcspn($this->rawtext, $string, $startpos);
406 $this->position += $length;
407 return substr($this->rawtext, $startpos, $length);
411 * Moves the position forward past any whitespace characters
415 function ignoreWhitespace() {
416 $this->position += strspn($this->rawtext, " \n\r\t", $this->position);
420 * Begins the parsing operation, setting up the parsed and unparsed
421 * XML entity decorators if necessary then delegating further work
423 * @param string XML document to parse
427 function parse($data) {
428 parent::parse($data);
433 * Default NullHandler for methods which were not set by user
434 * @package XML_HTMLSax
437 class XML_HTMLSax_NullHandler {
439 * Generic handler method which does nothing
443 function DoNothing() {
448 * User interface class. All user calls should only be made to this class
449 * @package XML_HTMLSax
452 class XML_HTMLSax extends Pear {
454 * Instance of concrete subclass of XML_HTMLSax_StateParser
455 * @var XML_HTMLSax_StateParser
461 * Constructs XML_HTMLSax selecting concrete StateParser subclass
462 * depending on PHP version being used as well as setting the default
463 * NullHandler for all callbacks<br />
466 * $myHandler = new MyHandler();
467 * $parser = new XML_HTMLSax();
468 * $parser->set_object($myHandler);
469 * $parser->set_option('XML_OPTION_CASE_FOLDING');
470 * $parser->set_element_handler('myOpenHandler','myCloseHandler');
471 * $parser->set_data_handler('myDataHandler');
472 * $parser->parser($xml);
476 function XML_HTMLSax() {
477 if (version_compare(phpversion(), '4.3', 'ge')) {
478 $this->state_parser = new XML_HTMLSax_StateParser_Gtet430($this);
480 $this->state_parser = new XML_HTMLSax_StateParser_Lt430($this);
482 $nullhandler = new XML_HTMLSax_NullHandler();
483 $this->set_object($nullhandler);
484 $this->set_element_handler('DoNothing', 'DoNothing');
485 $this->set_data_handler('DoNothing');
486 $this->set_pi_handler('DoNothing');
487 $this->set_jasp_handler('DoNothing');
488 $this->set_escape_handler('DoNothing');
492 * Sets the user defined handler object. Returns a PEAR Error
493 * if supplied argument is not an object.
494 * @param object handler object containing SAX callback methods
498 function set_object(&$object) {
499 if ( is_object($object) ) {
500 $this->state_parser->handler_default =& $object;
503 return $this->raiseError('XML_HTMLSax::set_object requires '.
504 'an object instance');
509 * Sets a parser option. Returns a PEAR Error if option is invalid<br />
510 * <b>Available options:</b>
512 * <li>XML_OPTION_TRIM_DATA_NODES: trim whitespace off the beginning
513 * and end of data passed to the data handler</li>
514 * <li>XML_OPTION_LINEFEED_BREAK: linefeeds result in additional data
516 * <li>XML_OPTION_TAB_BREAK: tabs result in additional data handler
518 * <li>XML_OPTION_ENTIES_UNPARSED: XML entities are returned as
519 * seperate data handler calls in unparsed form</li>
520 * <li>XML_OPTION_ENTIES_PARSED: (PHP 4.3.0+ only) XML entities are
521 * returned as seperate data handler calls and are parsed with
522 * PHP's html_entity_decode() function</li>
524 * @param string name of parser option
525 * @param int (optional) 1 to switch on, 0 for off
529 function set_option($name, $value=1) {
530 if ( array_key_exists($name,$this->state_parser->parser_options) ) {
531 $this->state_parser->parser_options[$name] = $value;
534 return $this->raiseError('XML_HTMLSax::set_option('.$name.') illegal');
539 * Sets the data handler method which deals with the contents of XML
541 * The handler method must accept two arguments, the first being an
542 * instance of XML_HTMLSax and the second being the contents of an
545 * function myDataHander(& $parser,$data){}
547 * @param string name of method
552 function set_data_handler($data_method) {
553 $this->state_parser->handler_object_data =& $this->state_parser->handler_default;
554 $this->state_parser->handler_method_data = $data_method;
558 * Sets the open and close tag handlers
559 * <br />The open handler method must accept three arguments; the parser,
560 * the tag name and an array of attributes e.g.
562 * function myOpenHander(& $parser,$tagname,$attrs=array()){}
564 * The close handler method must accept two arguments; the parser and
567 * function myCloseHander(& $parser,$tagname){}
569 * @param string name of open method
570 * @param string name of close method
575 function set_element_handler($opening_method, $closing_method) {
576 $this->state_parser->handler_object_element =& $this->state_parser->handler_default;
577 $this->state_parser->handler_method_opening = $opening_method;
578 $this->state_parser->handler_method_closing = $closing_method;
582 * Sets the processing instruction handler method e.g. for PHP open
583 * and close tags<br />
584 * The handler method must accept three arguments; the parser, the
585 * PI target and data inside the PI
587 * function myPIHander(& $parser,$target, $data){}
589 * @param string name of method
594 function set_pi_handler($pi_method) {
595 $this->state_parser->handler_object_pi =& $this->state_parser->handler_default;
596 $this->state_parser->handler_method_pi = $pi_method;
600 * Sets the XML escape handler method e.g. for comments and doctype
602 * The handler method must accept two arguments; the parser and the
603 * contents of the escaped section
605 * function myEscapeHander(& $parser, $data){}
607 * @param string name of method
612 function set_escape_handler($escape_method) {
613 $this->state_parser->handler_object_escape =& $this->state_parser->handler_default;
614 $this->state_parser->handler_method_escape = $escape_method;
618 * Sets the JSP/ASP markup handler<br />
619 * The handler method must accept two arguments; the parser and
620 * body of the JASP tag
622 * function myJaspHander(& $parser, $data){}
624 * @param string name of method
629 function set_jasp_handler ($jasp_method) {
630 $this->state_parser->handler_object_jasp =& $this->state_parser->handler_default;
631 $this->state_parser->handler_method_jasp = $jasp_method;
635 * Returns the current string position of the "cursor" inside the XML
637 * <br />Intended for use from within a user defined handler called
638 * via the $parser reference e.g.
640 * function myDataHandler(& $parser,$data) {
641 * echo( 'Current position: '.$parser->get_current_position() );
648 function get_current_position() {
649 return $this->state_parser->position;
653 * Returns the string length of the XML document being parsed
657 function get_length() {
658 return $this->state_parser->length;
662 * Start parsing some XML
663 * @param string XML document
667 function parse($data) {
668 $this->state_parser->parse($data);