diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Pdf/Trailer/Keeper.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Pdf/Trailer/Keeper.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,143 @@
+<?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) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Keeper.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+
+/** 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) 2005-2010 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 new Zend_Pdf_Exception($e->getMessage(), $e->getCode(), $e);
+        }
+    }
+}