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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Pdf
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Keeper.php 18993 2009-11-15 17:09:16Z alexander $
*/
/** Zend_Pdf_Trailer */
require_once 'Zend/Pdf/Trailer.php';
/**
* PDF file trailer.
* Stores and provides access to the trailer parced from a PDF file
*
* @package Zend_Pdf
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Pdf_Trailer_Keeper extends Zend_Pdf_Trailer
{
/**
* Reference context
*
* @var Zend_Pdf_Element_Reference_Context
*/
private $_context;
/**
* Previous trailer
*
* @var Zend_Pdf_Trailer
*/
private $_prev;
/**
* Object constructor
*
* @param Zend_Pdf_Element_Dictionary $dict
* @param Zend_Pdf_Element_Reference_Context $context
* @param Zend_Pdf_Trailer $prev
*/
public function __construct(Zend_Pdf_Element_Dictionary $dict,
Zend_Pdf_Element_Reference_Context $context,
Zend_Pdf_Trailer $prev = null)
{
parent::__construct($dict);
$this->_context = $context;
$this->_prev = $prev;
}
/**
* Setter for $this->_prev
*
* @param Zend_Pdf_Trailer_Keeper $prev
*/
public function setPrev(Zend_Pdf_Trailer_Keeper $prev)
{
$this->_prev = $prev;
}
/**
* Getter for $this->_prev
*
* @return Zend_Pdf_Trailer
*/
public function getPrev()
{
return $this->_prev;
}
/**
* Get length of source PDF
*
* @return string
*/
public function getPDFLength()
{
return $this->_context->getParser()->getLength();
}
/**
* Get PDF String
*
* @return string
*/
public function getPDFString()
{
return $this->_context->getParser()->getString();
}
/**
* Get reference table, which corresponds to the trailer.
* Proxy to the $_context member methad call
*
* @return Zend_Pdf_Element_Reference_Context
*/
public function getRefTable()
{
return $this->_context->getRefTable();
}
/**
* Get header of free objects list
* Returns object number of last free object
*
* @throws Zend_Pdf_Exception
* @return integer
*/
public function getLastFreeObject()
{
try {
$this->_context->getRefTable()->getNextFree('0 65535 R');
} catch (Zend_Pdf_Exception $e) {
if ($e->getMessage() == 'Object not found.') {
/**
* Here is work around for some wrong generated PDFs.
* We have not found reference to the header of free object list,
* thus we treat it as there are no free objects.
*/
return 0;
}
throw $e;
}
}
}
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