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engine/lib/XML/HTMLSax3.php
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engine/lib/XML/HTMLSax3.php
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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4: */
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//
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2002 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject toversion 3.0 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/3_0.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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||||
// | obtain it through the world-wide-web, please send a note to |
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||||
// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Authors: Alexander Zhukov <alex@veresk.ru> Original port from Python |
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// | Authors: Harry Fuecks <hfuecks@phppatterns.com> Port to PEAR + more |
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// | Authors: Many @ Sitepointforums Advanced PHP Forums |
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// +----------------------------------------------------------------------+
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//
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// $Id: HTMLSax3.php,v 1.2 2007/10/29 21:41:34 hfuecks Exp $
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//
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/**
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* Main parser components
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* @package XML_HTMLSax3
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* @version $Id: HTMLSax3.php,v 1.2 2007/10/29 21:41:34 hfuecks Exp $
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*/
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/**
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* Required classes
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*/
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define('XML_HTMLSAX3', 'XML/');
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if (!defined('XML_HTMLSAX3')) {
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define('XML_HTMLSAX3', 'XML/');
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}
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require_once(__DIR__ . '/HTMLSax3/States.php');
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require_once(__DIR__ . '/HTMLSax3/Decorators.php');
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/**
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* Base State Parser
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* @package XML_HTMLSax3
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* @access protected
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* @abstract
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*/
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class XML_HTMLSax3_StateParser {
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/**
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* Instance of user front end class to be passed to callbacks
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* @var XML_HTMLSax3
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* @access private
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*/
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var $htmlsax;
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/**
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* User defined object for handling elements
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* @var object
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* @access private
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*/
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var $handler_object_element;
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/**
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* User defined open tag handler method
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* @var string
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* @access private
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*/
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var $handler_method_opening;
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/**
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* User defined close tag handler method
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* @var string
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* @access private
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*/
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var $handler_method_closing;
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/**
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* User defined object for handling data in elements
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* @var object
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* @access private
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*/
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var $handler_object_data;
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/**
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* User defined data handler method
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* @var string
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* @access private
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*/
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var $handler_method_data;
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/**
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* User defined object for handling processing instructions
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* @var object
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* @access private
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*/
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var $handler_object_pi;
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/**
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* User defined processing instruction handler method
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* @var string
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* @access private
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*/
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var $handler_method_pi;
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/**
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* User defined object for handling JSP/ASP tags
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* @var object
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* @access private
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*/
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var $handler_object_jasp;
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/**
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* User defined JSP/ASP handler method
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* @var string
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* @access private
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*/
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var $handler_method_jasp;
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/**
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* User defined object for handling XML escapes
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* @var object
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* @access private
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*/
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var $handler_object_escape;
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/**
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* User defined XML escape handler method
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* @var string
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* @access private
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*/
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var $handler_method_escape;
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/**
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* User defined handler object or NullHandler
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* @var object
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* @access private
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*/
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var $handler_default;
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/**
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* Parser options determining parsing behavior
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* @var array
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* @access private
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*/
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var $parser_options = array();
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/**
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* XML document being parsed
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* @var string
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* @access private
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*/
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var $rawtext;
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/**
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* Position in XML document relative to start (0)
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* @var int
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* @access private
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*/
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var $position;
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/**
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* Length of the XML document in characters
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* @var int
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* @access private
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*/
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var $length;
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/**
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* Array of state objects
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* @var array
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* @access private
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*/
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var $State = array();
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/**
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* Constructs XML_HTMLSax3_StateParser setting up states
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* @var XML_HTMLSax3 instance of user front end class
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* @access protected
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*/
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function XML_HTMLSax3_StateParser (& $htmlsax) {
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$this->htmlsax = & $htmlsax;
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$this->State[XML_HTMLSAX3_STATE_START] =new XML_HTMLSax3_StartingState();
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$this->State[XML_HTMLSAX3_STATE_CLOSING_TAG] =new XML_HTMLSax3_ClosingTagState();
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$this->State[XML_HTMLSAX3_STATE_TAG] =new XML_HTMLSax3_TagState();
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$this->State[XML_HTMLSAX3_STATE_OPENING_TAG] =new XML_HTMLSax3_OpeningTagState();
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$this->State[XML_HTMLSAX3_STATE_PI] =new XML_HTMLSax3_PiState();
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$this->State[XML_HTMLSAX3_STATE_JASP] =new XML_HTMLSax3_JaspState();
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$this->State[XML_HTMLSAX3_STATE_ESCAPE] =new XML_HTMLSax3_EscapeState();
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}
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/**
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* Moves the position back one character
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* @access protected
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* @return void
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*/
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function unscanCharacter() {
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$this->position -= 1;
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}
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/**
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* Moves the position forward one character
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* @access protected
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* @return void
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*/
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function ignoreCharacter() {
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$this->position += 1;
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}
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/**
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* Returns the next character from the XML document or void if at end
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* @access protected
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* @return mixed
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*/
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function scanCharacter() {
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if ($this->position < $this->length) {
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return $this->rawtext{$this->position++};
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}
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}
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/**
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* Returns a string from the current position to the next occurance
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* of the supplied string
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* @param string string to search until
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* @access protected
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* @return string
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*/
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function scanUntilString($string) {
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$start = $this->position;
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$this->position = strpos($this->rawtext, $string, $start);
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if ($this->position === FALSE) {
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$this->position = $this->length;
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}
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return substr($this->rawtext, $start, $this->position - $start);
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}
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/**
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* Returns a string from the current position until the first instance of
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* one of the characters in the supplied string argument
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* @param string string to search until
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* @access protected
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* @return string
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* @abstract
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*/
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function scanUntilCharacters($string) {}
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/**
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* Moves the position forward past any whitespace characters
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* @access protected
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* @return void
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* @abstract
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*/
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function ignoreWhitespace() {}
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/**
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* Begins the parsing operation, setting up any decorators, depending on
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* parse options invoking _parse() to execute parsing
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* @param string XML document to parse
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* @access protected
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* @return void
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*/
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function parse($data) {
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if ($this->parser_options['XML_OPTION_TRIM_DATA_NODES']==1) {
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$decorator =new XML_HTMLSax3_Trim(
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$this->handler_object_data,
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$this->handler_method_data);
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$this->handler_object_data =& $decorator;
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$this->handler_method_data = 'trimData';
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}
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if ($this->parser_options['XML_OPTION_CASE_FOLDING']==1) {
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$open_decor =new XML_HTMLSax3_CaseFolding(
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$this->handler_object_element,
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$this->handler_method_opening,
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$this->handler_method_closing);
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$this->handler_object_element =& $open_decor;
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$this->handler_method_opening ='foldOpen';
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$this->handler_method_closing ='foldClose';
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}
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if ($this->parser_options['XML_OPTION_LINEFEED_BREAK']==1) {
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$decorator =new XML_HTMLSax3_Linefeed(
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$this->handler_object_data,
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$this->handler_method_data);
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$this->handler_object_data =& $decorator;
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$this->handler_method_data = 'breakData';
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}
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if ($this->parser_options['XML_OPTION_TAB_BREAK']==1) {
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$decorator =new XML_HTMLSax3_Tab(
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$this->handler_object_data,
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$this->handler_method_data);
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$this->handler_object_data =& $decorator;
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$this->handler_method_data = 'breakData';
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}
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if ($this->parser_options['XML_OPTION_ENTITIES_UNPARSED']==1) {
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$decorator =new XML_HTMLSax3_Entities_Unparsed(
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$this->handler_object_data,
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$this->handler_method_data);
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$this->handler_object_data =& $decorator;
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$this->handler_method_data = 'breakData';
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}
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if ($this->parser_options['XML_OPTION_ENTITIES_PARSED']==1) {
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$decorator =new XML_HTMLSax3_Entities_Parsed(
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$this->handler_object_data,
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$this->handler_method_data);
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$this->handler_object_data =& $decorator;
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$this->handler_method_data = 'breakData';
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}
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// Note switched on by default
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if ($this->parser_options['XML_OPTION_STRIP_ESCAPES']==1) {
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$decorator =new XML_HTMLSax3_Escape_Stripper(
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$this->handler_object_escape,
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$this->handler_method_escape);
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$this->handler_object_escape =& $decorator;
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$this->handler_method_escape = 'strip';
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}
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$this->rawtext = $data;
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$this->length = strlen($data);
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$this->position = 0;
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$this->_parse();
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}
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/**
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* Performs the parsing itself, delegating calls to a specific parser
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* state
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* @param constant state object to parse with
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* @access protected
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* @return void
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*/
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function _parse($state = XML_HTMLSAX3_STATE_START) {
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do {
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$state = $this->State[$state]->parse($this);
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||||
} while ($state != XML_HTMLSAX3_STATE_STOP &&
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$this->position < $this->length);
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||||
}
|
||||
}
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|
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/**
|
||||
* Parser for PHP Versions below 4.3.0. Uses a slower parsing mechanism than
|
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* the equivalent PHP 4.3.0+ subclass of StateParser
|
||||
* @package XML_HTMLSax3
|
||||
* @access protected
|
||||
* @see XML_HTMLSax3_StateParser_Gtet430
|
||||
*/
|
||||
class XML_HTMLSax3_StateParser_Lt430 extends XML_HTMLSax3_StateParser {
|
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/**
|
||||
* Constructs XML_HTMLSax3_StateParser_Lt430 defining available
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||||
* parser options
|
||||
* @var XML_HTMLSax3 instance of user front end class
|
||||
* @access protected
|
||||
*/
|
||||
function XML_HTMLSax3_StateParser_Lt430(& $htmlsax) {
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parent::XML_HTMLSax3_StateParser($htmlsax);
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$this->parser_options['XML_OPTION_TRIM_DATA_NODES'] = 0;
|
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$this->parser_options['XML_OPTION_CASE_FOLDING'] = 0;
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$this->parser_options['XML_OPTION_LINEFEED_BREAK'] = 0;
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$this->parser_options['XML_OPTION_TAB_BREAK'] = 0;
|
||||
$this->parser_options['XML_OPTION_ENTITIES_PARSED'] = 0;
|
||||
$this->parser_options['XML_OPTION_ENTITIES_UNPARSED'] = 0;
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$this->parser_options['XML_OPTION_STRIP_ESCAPES'] = 0;
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}
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|
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/**
|
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* Returns a string from the current position until the first instance of
|
||||
* one of the characters in the supplied string argument
|
||||
* @param string string to search until
|
||||
* @access protected
|
||||
* @return string
|
||||
*/
|
||||
function scanUntilCharacters($string) {
|
||||
$startpos = $this->position;
|
||||
while ($this->position < $this->length && strpos($string, $this->rawtext{$this->position}) === FALSE) {
|
||||
$this->position++;
|
||||
}
|
||||
return substr($this->rawtext, $startpos, $this->position - $startpos);
|
||||
}
|
||||
|
||||
/**
|
||||
* Moves the position forward past any whitespace characters
|
||||
* @access protected
|
||||
* @return void
|
||||
*/
|
||||
function ignoreWhitespace() {
|
||||
while ($this->position < $this->length &&
|
||||
strpos(" \n\r\t", $this->rawtext{$this->position}) !== FALSE) {
|
||||
$this->position++;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Begins the parsing operation, setting up the unparsed XML entities
|
||||
* decorator if necessary then delegating further work to parent
|
||||
* @param string XML document to parse
|
||||
* @access protected
|
||||
* @return void
|
||||
*/
|
||||
function parse($data) {
|
||||
parent::parse($data);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Parser for PHP Versions equal to or greater than 4.3.0. Uses a faster
|
||||
* parsing mechanism than the equivalent PHP < 4.3.0 subclass of StateParser
|
||||
* @package XML_HTMLSax3
|
||||
* @access protected
|
||||
* @see XML_HTMLSax3_StateParser_Lt430
|
||||
*/
|
||||
class XML_HTMLSax3_StateParser_Gtet430 extends XML_HTMLSax3_StateParser {
|
||||
/**
|
||||
* Constructs XML_HTMLSax3_StateParser_Gtet430 defining available
|
||||
* parser options
|
||||
* @var XML_HTMLSax3 instance of user front end class
|
||||
* @access protected
|
||||
*/
|
||||
function XML_HTMLSax3_StateParser_Gtet430(& $htmlsax) {
|
||||
parent::XML_HTMLSax3_StateParser($htmlsax);
|
||||
$this->parser_options['XML_OPTION_TRIM_DATA_NODES'] = 0;
|
||||
$this->parser_options['XML_OPTION_CASE_FOLDING'] = 0;
|
||||
$this->parser_options['XML_OPTION_LINEFEED_BREAK'] = 0;
|
||||
$this->parser_options['XML_OPTION_TAB_BREAK'] = 0;
|
||||
$this->parser_options['XML_OPTION_ENTITIES_PARSED'] = 0;
|
||||
$this->parser_options['XML_OPTION_ENTITIES_UNPARSED'] = 0;
|
||||
$this->parser_options['XML_OPTION_STRIP_ESCAPES'] = 0;
|
||||
}
|
||||
/**
|
||||
* Returns a string from the current position until the first instance of
|
||||
* one of the characters in the supplied string argument.
|
||||
* @param string string to search until
|
||||
* @access protected
|
||||
* @return string
|
||||
*/
|
||||
function scanUntilCharacters($string) {
|
||||
$startpos = $this->position;
|
||||
$length = strcspn($this->rawtext, $string, $startpos);
|
||||
$this->position += $length;
|
||||
return substr($this->rawtext, $startpos, $length);
|
||||
}
|
||||
|
||||
/**
|
||||
* Moves the position forward past any whitespace characters
|
||||
* @access protected
|
||||
* @return void
|
||||
*/
|
||||
function ignoreWhitespace() {
|
||||
$this->position += strspn($this->rawtext, " \n\r\t", $this->position);
|
||||
}
|
||||
|
||||
/**
|
||||
* Begins the parsing operation, setting up the parsed and unparsed
|
||||
* XML entity decorators if necessary then delegating further work
|
||||
* to parent
|
||||
* @param string XML document to parse
|
||||
* @access protected
|
||||
* @return void
|
||||
*/
|
||||
function parse($data) {
|
||||
parent::parse($data);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Default NullHandler for methods which were not set by user
|
||||
* @package XML_HTMLSax3
|
||||
* @access protected
|
||||
*/
|
||||
class XML_HTMLSax3_NullHandler {
|
||||
/**
|
||||
* Generic handler method which does nothing
|
||||
* @access protected
|
||||
* @return void
|
||||
*/
|
||||
function DoNothing() {
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* User interface class. All user calls should only be made to this class
|
||||
* @package XML_HTMLSax3
|
||||
* @access public
|
||||
*/
|
||||
class XML_HTMLSax3 {
|
||||
/**
|
||||
* Instance of concrete subclass of XML_HTMLSax3_StateParser
|
||||
* @var XML_HTMLSax3_StateParser
|
||||
* @access private
|
||||
*/
|
||||
var $state_parser;
|
||||
|
||||
/**
|
||||
* Constructs XML_HTMLSax3 selecting concrete StateParser subclass
|
||||
* depending on PHP version being used as well as setting the default
|
||||
* NullHandler for all callbacks<br />
|
||||
* <b>Example:</b>
|
||||
* <pre>
|
||||
* $myHandler = new MyHandler();
|
||||
* $parser = new XML_HTMLSax3();
|
||||
* $parser->set_object($myHandler);
|
||||
* $parser->set_option('XML_OPTION_CASE_FOLDING');
|
||||
* $parser->set_element_handler('myOpenHandler','myCloseHandler');
|
||||
* $parser->set_data_handler('myDataHandler');
|
||||
* $parser->parser($xml);
|
||||
* </pre>
|
||||
* @access public
|
||||
*/
|
||||
function XML_HTMLSax3() {
|
||||
if (version_compare(phpversion(), '4.3', 'ge')) {
|
||||
$this->state_parser =new XML_HTMLSax3_StateParser_Gtet430($this);
|
||||
} else {
|
||||
$this->state_parser =new XML_HTMLSax3_StateParser_Lt430($this);
|
||||
}
|
||||
$nullhandler =new XML_HTMLSax3_NullHandler();
|
||||
$this->set_object($nullhandler);
|
||||
$this->set_element_handler('DoNothing', 'DoNothing');
|
||||
$this->set_data_handler('DoNothing');
|
||||
$this->set_pi_handler('DoNothing');
|
||||
$this->set_jasp_handler('DoNothing');
|
||||
$this->set_escape_handler('DoNothing');
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the user defined handler object. Returns a PEAR Error
|
||||
* if supplied argument is not an object.
|
||||
* @param object handler object containing SAX callback methods
|
||||
* @access public
|
||||
* @return mixed
|
||||
*/
|
||||
function set_object(&$object) {
|
||||
if ( is_object($object) ) {
|
||||
$this->state_parser->handler_default =& $object;
|
||||
return true;
|
||||
} else {
|
||||
require_once('PEAR.php');
|
||||
PEAR::raiseError('XML_HTMLSax3::set_object requires '.
|
||||
'an object instance');
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets a parser option. By default all options are switched off.
|
||||
* Returns a PEAR Error if option is invalid<br />
|
||||
* <b>Available options:</b>
|
||||
* <ul>
|
||||
* <li>XML_OPTION_TRIM_DATA_NODES: trim whitespace off the beginning
|
||||
* and end of data passed to the data handler</li>
|
||||
* <li>XML_OPTION_LINEFEED_BREAK: linefeeds result in additional data
|
||||
* handler calls</li>
|
||||
* <li>XML_OPTION_TAB_BREAK: tabs result in additional data handler
|
||||
* calls</li>
|
||||
* <li>XML_OPTION_ENTITIES_UNPARSED: XML entities are returned as
|
||||
* seperate data handler calls in unparsed form</li>
|
||||
* <li>XML_OPTION_ENTITIES_PARSED: (PHP 4.3.0+ only) XML entities are
|
||||
* returned as seperate data handler calls and are parsed with
|
||||
* PHP's html_entity_decode() function</li>
|
||||
* <li>XML_OPTION_STRIP_ESCAPES: strips out the -- -- comment markers
|
||||
* or CDATA markup inside an XML escape, if found.</li>
|
||||
* </ul>
|
||||
* To get HTMLSax to behave in the same way as the native PHP SAX parser,
|
||||
* using it's default state, you need to switch on XML_OPTION_LINEFEED_BREAK,
|
||||
* XML_OPTION_ENTITIES_PARSED and XML_OPTION_CASE_FOLDING
|
||||
* @param string name of parser option
|
||||
* @param int (optional) 1 to switch on, 0 for off
|
||||
* @access public
|
||||
* @return boolean
|
||||
*/
|
||||
function set_option($name, $value=1) {
|
||||
if ( array_key_exists($name,$this->state_parser->parser_options) ) {
|
||||
$this->state_parser->parser_options[$name] = $value;
|
||||
return true;
|
||||
} else {
|
||||
require_once('PEAR.php');
|
||||
PEAR::raiseError('XML_HTMLSax3::set_option('.$name.') illegal');
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the data handler method which deals with the contents of XML
|
||||
* elements.<br />
|
||||
* The handler method must accept two arguments, the first being an
|
||||
* instance of XML_HTMLSax3 and the second being the contents of an
|
||||
* XML element e.g.
|
||||
* <pre>
|
||||
* function myDataHander(& $parser,$data){}
|
||||
* </pre>
|
||||
* @param string name of method
|
||||
* @access public
|
||||
* @return void
|
||||
* @see set_object
|
||||
*/
|
||||
function set_data_handler($data_method) {
|
||||
$this->state_parser->handler_object_data =& $this->state_parser->handler_default;
|
||||
$this->state_parser->handler_method_data = $data_method;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the open and close tag handlers
|
||||
* <br />The open handler method must accept three arguments; the parser,
|
||||
* the tag name and an array of attributes e.g.
|
||||
* <pre>
|
||||
* function myOpenHander(& $parser,$tagname,$attrs=array()){}
|
||||
* </pre>
|
||||
* The close handler method must accept two arguments; the parser and
|
||||
* the tag name e.g.
|
||||
* <pre>
|
||||
* function myCloseHander(& $parser,$tagname){}
|
||||
* </pre>
|
||||
* @param string name of open method
|
||||
* @param string name of close method
|
||||
* @access public
|
||||
* @return void
|
||||
* @see set_object
|
||||
*/
|
||||
function set_element_handler($opening_method, $closing_method) {
|
||||
$this->state_parser->handler_object_element =& $this->state_parser->handler_default;
|
||||
$this->state_parser->handler_method_opening = $opening_method;
|
||||
$this->state_parser->handler_method_closing = $closing_method;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the processing instruction handler method e.g. for PHP open
|
||||
* and close tags<br />
|
||||
* The handler method must accept three arguments; the parser, the
|
||||
* PI target and data inside the PI
|
||||
* <pre>
|
||||
* function myPIHander(& $parser,$target, $data){}
|
||||
* </pre>
|
||||
* @param string name of method
|
||||
* @access public
|
||||
* @return void
|
||||
* @see set_object
|
||||
*/
|
||||
function set_pi_handler($pi_method) {
|
||||
$this->state_parser->handler_object_pi =& $this->state_parser->handler_default;
|
||||
$this->state_parser->handler_method_pi = $pi_method;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the XML escape handler method e.g. for comments and doctype
|
||||
* declarations<br />
|
||||
* The handler method must accept two arguments; the parser and the
|
||||
* contents of the escaped section
|
||||
* <pre>
|
||||
* function myEscapeHander(& $parser, $data){}
|
||||
* </pre>
|
||||
* @param string name of method
|
||||
* @access public
|
||||
* @return void
|
||||
* @see set_object
|
||||
*/
|
||||
function set_escape_handler($escape_method) {
|
||||
$this->state_parser->handler_object_escape =& $this->state_parser->handler_default;
|
||||
$this->state_parser->handler_method_escape = $escape_method;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the JSP/ASP markup handler<br />
|
||||
* The handler method must accept two arguments; the parser and
|
||||
* body of the JASP tag
|
||||
* <pre>
|
||||
* function myJaspHander(& $parser, $data){}
|
||||
* </pre>
|
||||
* @param string name of method
|
||||
* @access public
|
||||
* @return void
|
||||
* @see set_object
|
||||
*/
|
||||
function set_jasp_handler ($jasp_method) {
|
||||
$this->state_parser->handler_object_jasp =& $this->state_parser->handler_default;
|
||||
$this->state_parser->handler_method_jasp = $jasp_method;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the current string position of the "cursor" inside the XML
|
||||
* document
|
||||
* <br />Intended for use from within a user defined handler called
|
||||
* via the $parser reference e.g.
|
||||
* <pre>
|
||||
* function myDataHandler(& $parser,$data) {
|
||||
* echo( 'Current position: '.$parser->get_current_position() );
|
||||
* }
|
||||
* </pre>
|
||||
* @access public
|
||||
* @return int
|
||||
* @see get_length
|
||||
*/
|
||||
function get_current_position() {
|
||||
return $this->state_parser->position;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the string length of the XML document being parsed
|
||||
* @access public
|
||||
* @return int
|
||||
*/
|
||||
function get_length() {
|
||||
return $this->state_parser->length;
|
||||
}
|
||||
|
||||
/**
|
||||
* Start parsing some XML
|
||||
* @param string XML document
|
||||
* @access public
|
||||
* @return void
|
||||
*/
|
||||
function parse($data) {
|
||||
$this->state_parser->parse($data);
|
||||
}
|
||||
}
|
||||
?>
|
||||
Reference in New Issue
Block a user