<?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:

 */

/** Internally used classes */

require_once 'Zend/Pdf/Element.php';

require_once 'Zend/Pdf/Element/Array.php';

require_once 'Zend/Pdf/Element/String/Binary.php';

require_once 'Zend/Pdf/Element/Boolean.php';

require_once 'Zend/Pdf/Element/Dictionary.php';

require_once 'Zend/Pdf/Element/Name.php';

require_once 'Zend/Pdf/Element/Null.php';

require_once 'Zend/Pdf/Element/Numeric.php';

require_once 'Zend/Pdf/Element/String.php';

/**

 * Resource extractor class is used to detach resources from original PDF document.

 *

 * It provides resources sharing, so different pages or other PDF resources can share

 * its dependent resources (e.g. fonts or images) or other resources still use them without duplication.

 * It also reduces output PDF size, required memory for PDF processing and

 * processing time.

 *

 * The same extractor may be used for different source documents, several

 * extractors may be used for constracting one target document, but extractor

 * must not be shared between target documents.

 *

 * @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_Resource_Extractor

{

    /**

     * PDF objects factory.

     *

     * @var Zend_Pdf_ElementFactory_Interface

     */

    protected $_factory;

    /**

     * Reusable list of already processed objects

     *

     * @var array

     */

    protected $_processed;

    /**

     * Object constructor.

     */

    public function __construct()

    {

        $this->_factory   = Zend_Pdf_ElementFactory::createFactory(1);

        $this->_processed = array();

    }

    /**

     * Clone page, extract it and dependent objects from the current document,

     * so it can be used within other docs

     *

     * return Zend_Pdf_Page

     */

    public function clonePage(Zend_Pdf_Page $page)

    {

        return $page->clonePage($this->_factory, $this->_processed);

    }

}