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<?php
/**
* @package SPLIB
* @version $Id: HTMLtoPDF.php,v 1.1 2003/12/12 08:06:02 kevin Exp $
*/
/**
* Include PEAR::XML_HTMLSax
* http://pear.php.net/XML_HTMLSax
*/
require_once('XML/XML_HTMLSax.php');
/**
* HTMLtoPDF converts simple HTML to PDF
* Defines handlers for responding to HTML elements
* @package SPLIB
* @access public
*/
class HTMLtoPDF {
/**
* Instance of PEAR::XML_HTMLSax
* @access private
* @var XML_HTMLSax
*/
var $parser;
/**
* Instance of ArticlePDF
* @access private
* @var HTMLtoPDF
*/
var $articlePdf;
/**
* Stores text until added to PDF document
* @access private
* @var string
*/
var $buffer = '';
/**
* Temporary store for R&OS PDF tags
* @access private
* @var string
*/
var $open = NULL;
/**
* Temporary store for R&OS PDF tags
* @access private
* @var string
*/
var $close = NULL;
/**
* Value to increase text size by for headers
* @access private
* @var int
*/
var $header = NULL;
/**
* PdfFilter Constructor
* @param ArticlePDF instance of ArticlePDF
* @access public
*/
function HTMLtoPDF(& $articlePDF) {
$this->articlePDF=& $articlePDF;
$this->parser = new XML_HTMLSax();
$this->parser->set_object($this);
$this->parser->set_element_handler('open','close');
$this->parser->set_data_handler('data');
}
/**
* Opening tag event "listener"
* @param XML_HTMLSax instance of the parser
* @param string HTML tag name
* @param array of tag attributes
* @return void
* @access private
*/
function open($parser,$tag,$attr) {
$tag=strtolower($tag); // Convert tag to lower case
switch ( $tag ) {
case 'a':
if ( isset ($attr['href']) ) {
$this->open='<c:alink:'.$attr['href'].'>';
$this->close='</c:alink>';
}
break;
case 'b':
$this->open='<b>';
$this->close='</b>';
break;
case 'br':
$this->articlePDF->addText($this->buffer);
$this->buffer='';
break;
case 'h1':
$this->header='12';
break;
case 'h2':
$this->header='10';
break;
case 'h3':
$this->header='8';
break;
case 'h4':
$this->header='6';
break;
case 'h5':
$this->header='4';
break;
case 'i':
$this->open='<i>';
$this->close='</i>';
break;
case 'p':
$this->articlePDF->addText($this->buffer);
$this->buffer='';
break;
case 'strong':
$this->open='<b>';
$this->close='</b>';
break;
}
}
/**
* Character data event "listener"
* @param XML_HTMLSax instance of the parser
* @param string character data
* @return void
* @access private
*/
function data($parser, $data) {
$data= str_replace(
array('>', '<', '"', '&', ' '),
array('>', '<', '"', '&', ' '),
$data);
if ( isset($this->open) && isset($this->close) ) {
$this->buffer.=$this->open.$data.$this->close;
$this->open=NULL;
$this->close=NULL;
} else if ( isset ( $this->header ) ) {
$this->articlePDF->addText($data,10+$this->header,'left');
$this->header=NULL;
} else {
$this->buffer.=$data;
}
}
/**
* Closing tag event "listener"
* @param XML_HTMLSax instance of the parser
* @param string HTML tag name
* @return void
* @access private
*/
function close($parser,$tag) {
// Do nothing
}
/**
* Triggers parsing and converts newlines to <br /%gt;
* @param string HTML document
* @return void
* @access public
*/
function parse($html) {
$this->parser->parse(nl2br($html));
}
/**
* Adds any remaining text in the buffer then
* returns the ArticlePDF object
* @return object instance of ArticlePDF
* @access public
*/
function getPdf () {
$this->articlePDF->addText($this->buffer);
return $this->articlePDF;
}
}
?>
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