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<?php
/**
* SAXY_Parser_Base is a base class for SAXY and SAXY Lite
* @package saxy-xmlparser
* @version 1.0
* @copyright (C) 2004 John Heinstein. All rights reserved
* @license http://www.gnu.org/copyleft/lesser.html LGPL License
* @author John Heinstein <johnkarl@nbnet.nb.ca>
* @link http://www.engageinteractive.com/saxy/ SAXY Home Page
* SAXY is Free Software
**/
/** the initial characters of a cdata section */
define('SAXY_SEARCH_CDATA', '![CDATA[');
/** the length of the initial characters of a cdata section */
define('SAXY_CDATA_LEN', 8);
/** the initial characters of a notation */
define('SAXY_SEARCH_NOTATION', '!NOTATION');
/** the initial characters of a doctype */
define('SAXY_SEARCH_DOCTYPE', '!DOCTYPE');
/** saxy parse state, just before parsing an attribute */
define('SAXY_STATE_ATTR_NONE', 0);
/** saxy parse state, parsing an attribute key */
define('SAXY_STATE_ATTR_KEY', 1);
/** saxy parse state, parsing an attribute value */
define('SAXY_STATE_ATTR_VALUE', 2);
/**
* The base SAX Parser class
*
* @package saxy-xmlparser
* @author John Heinstein <johnkarl@nbnet.nb.ca>
*/
class SAXY_Parser_Base {
/** @var int The current state of the parser */
var $state;
/** @var int A temporary container for parsed characters */
var $charContainer;
/** @var Object A reference to the start event handler */
var $startElementHandler;
/** @var Object A reference to the end event handler */
var $endElementHandler;
/** @var Object A reference to the data event handler */
var $characterDataHandler;
/** @var Object A reference to the CDATA Section event handler */
var $cDataSectionHandler = null;
/** @var boolean True if predefined entities are to be converted into characters */
var $convertEntities = true;
/** @var Array Translation table for predefined entities */
var $predefinedEntities = array('&' => '&', '<' => '<', '>' => '>',
'"' => '"', ''' => "'");
/** @var Array User defined translation table for entities */
var $definedEntities = array();
/** @var boolean True if whitespace is to be preserved during parsing. NOT YET IMPLEMENTED! */
var $preserveWhitespace = false;
/**
* Constructor for SAX parser
*/
function SAXY_Parser_Base() {
$this->charContainer = '';
} //SAXY_Parser_Base
/**
* Sets a reference to the handler for the start element event
* @param mixed A reference to the start element handler
*/
function xml_set_element_handler($startHandler, $endHandler) {
$this->startElementHandler = $startHandler;
$this->endElementHandler = $endHandler;
} //xml_set_element_handler
/**
* Sets a reference to the handler for the data event
* @param mixed A reference to the data handler
*/
function xml_set_character_data_handler($handler) {
$this->characterDataHandler =& $handler;
} //xml_set_character_data_handler
/**
* Sets a reference to the handler for the CDATA Section event
* @param mixed A reference to the CDATA Section handler
*/
function xml_set_cdata_section_handler($handler) {
$this->cDataSectionHandler =& $handler;
} //xml_set_cdata_section_handler
/**
* Sets whether predefined entites should be replaced with their equivalent characters during parsing
* @param boolean True if entity replacement is to occur
*/
function convertEntities($truthVal) {
$this->convertEntities = $truthVal;
} //convertEntities
/**
* Appends an array of entity mappings to the existing translation table
*
* Intended mainly to facilitate the conversion of non-ASCII entities into equivalent characters
*
* @param array A list of entity mappings in the format: array('&' => '&');
*/
function appendEntityTranslationTable($table) {
$this->definedEntities = $table;
} //appendEntityTranslationTable
/**
* Gets the nth character from the end of the string
* @param string The text to be queried
* @param int The index from the end of the string
* @return string The found character
*/
function getCharFromEnd($text, $index) {
$len = strlen($text);
$char = $text{($len - 1 - $index)};
return $char;
} //getCharFromEnd
/**
* Parses the attributes string into an array of key / value pairs
* @param string The attribute text
* @return Array An array of key / value pairs
*/
function parseAttributes($attrText) {
$attrText = trim($attrText);
$attrArray = array();
$maybeEntity = false;
$total = strlen($attrText);
$keyDump = '';
$valueDump = '';
$currentState = SAXY_STATE_ATTR_NONE;
$quoteType = '';
for ($i = 0; $i < $total; $i++) {
// $currentChar = $attrText{$i};
$currentChar = substr($attrText, $i, 1);
if ($currentState == SAXY_STATE_ATTR_NONE) {
if (trim($currentChar != '')) {
$currentState = SAXY_STATE_ATTR_KEY;
}
}
switch ($currentChar) {
case "\t":
if ($currentState == SAXY_STATE_ATTR_VALUE) {
$valueDump .= $currentChar;
}
else {
$currentChar = '';
}
break;
case "\x0B": //vertical tab
case "\n":
case "\r":
$currentChar = '';
break;
case '=':
if ($currentState == SAXY_STATE_ATTR_VALUE) {
$valueDump .= $currentChar;
}
else {
$currentState = SAXY_STATE_ATTR_VALUE;
$quoteType = '';
$maybeEntity = false;
}
break;
case '"':
if ($currentState == SAXY_STATE_ATTR_VALUE) {
if ($quoteType == '') {
$quoteType = '"';
}
else {
if ($quoteType == $currentChar) {
// Joomla! hack
if (isset( $this ) && $this->convertEntities && $maybeEntity) {
$valueDump = strtr($valueDump, $this->predefinedEntities);
$valueDump = strtr($valueDump, $this->definedEntities);
}
$keyDump = trim($keyDump);
$attrArray[$keyDump] = $valueDump;
$keyDump = $valueDump = $quoteType = '';
$currentState = SAXY_STATE_ATTR_NONE;
}
else {
$valueDump .= $currentChar;
}
}
}
break;
case "'":
if ($currentState == SAXY_STATE_ATTR_VALUE) {
if ($quoteType == '') {
$quoteType = "'";
}
else {
if ($quoteType == $currentChar) {
// Joomla! hack
if (isset( $this ) && $this->convertEntities && $maybeEntity) {
$valueDump = strtr($valueDump, $this->predefinedEntities);
$valueDump = strtr($valueDump, $this->definedEntities);
}
$keyDump = trim($keyDump);
$attrArray[$keyDump] = $valueDump;
$keyDump = $valueDump = $quoteType = '';
$currentState = SAXY_STATE_ATTR_NONE;
}
else {
$valueDump .= $currentChar;
}
}
}
break;
case '&':
//might be an entity
$maybeEntity = true;
$valueDump .= $currentChar;
break;
default:
if ($currentState == SAXY_STATE_ATTR_KEY) {
$keyDump .= $currentChar;
}
else {
$valueDump .= $currentChar;
}
}
}
return $attrArray;
} //parseAttributes
/**
* Parses character data
* @param string The character data
*/
function parseBetweenTags($betweenTagText) {
if (trim($betweenTagText) != ''){
$this->fireCharacterDataEvent($betweenTagText);
}
} //parseBetweenTags
/**
* Fires a start element event
* @param string The start element tag name
* @param Array The start element attributes
*/
function fireStartElementEvent($tagName, $attributes) {
call_user_func($this->startElementHandler, $this, $tagName, $attributes);
} //fireStartElementEvent
/**
* Fires an end element event
* @param string The end element tag name
*/
function fireEndElementEvent($tagName) {
call_user_func($this->endElementHandler, $this, $tagName);
} //fireEndElementEvent
/**
* Fires a character data event
* @param string The character data
*/
function fireCharacterDataEvent($data) {
if ($this->convertEntities && ((strpos($data, "&") != -1))) {
$data = strtr($data, $this->predefinedEntities);
$data = strtr($data, $this->definedEntities);
}
call_user_func($this->characterDataHandler, $this, $data);
} //fireCharacterDataEvent
/**
* Fires a CDATA Section event
* @param string The CDATA Section data
*/
function fireCDataSectionEvent($data) {
call_user_func($this->cDataSectionHandler, $this, $data);
} //fireCDataSectionEvent
} //SAXY_Parser_Base
?>