<?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) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Resource.php 24593 2012-01-05 20:35:02Z matthew $

 */

/**

 * PDF file Resource abstraction

 *

 * @package    Zend_Pdf

 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

abstract class Zend_Pdf_Resource

{

    /**

     * Each Pdf resource (fonts, images, ...) interacts with a PDF itself.

     * It creates appropriate PDF objects, structures and sometime embedded files.

     * Resources are referenced in content streams by names, which are stored in

     * a page resource dictionaries.

     *

     * Thus, resources must be attached to the PDF.

     *

     * Resource abstraction uses own PDF object factory to store all necessary information.

     * At the render time internal object factory is appended to the global PDF file

     * factory.

     *

     * Resource abstraction also cashes information about rendered PDF files and

     * doesn't duplicate resource description each time then Resource is rendered

     * (referenced).

     *

     * @var Zend_Pdf_ElementFactory_Interface

     */

    protected $_objectFactory;

    /**

     * Main resource object

     *

     * @var Zend_Pdf_Element_Object

     */

    protected $_resource;

    /**

     * Object constructor.

     *

     * If resource is not a Zend_Pdf_Element object, then stream object with specified value is

     * generated.

     *

     * @param Zend_Pdf_Element|string $resource

     */

    public function __construct($resource)

    {

        if ($resource instanceof Zend_Pdf_Element_Object) {

            $this->_objectFactory = $resource->getFactory();

            $this->_resource      = $resource;

            return;

        }

        require_once 'Zend/Pdf/ElementFactory.php';

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

        if ($resource instanceof Zend_Pdf_Element) {

            $this->_resource  = $this->_objectFactory->newObject($resource);

        } else {

            $this->_resource  = $this->_objectFactory->newStreamObject($resource);

        }

    }

    /**

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

     * so it can be used within other docs.

     */

    public function __clone()

    {

        /** @todo implementation*/

//        $factory = Zend_Pdf_ElementFactory::createFactory(1);

//        $processed = array();

//

//        // Clone dictionary object.

//        // Do it explicitly to prevent sharing resource attributes between different

//        // results of clone operation (other resources are still shared)

//        $dictionary = new Zend_Pdf_Element_Dictionary();

//        foreach ($this->_pageDictionary->getKeys() as $key) {

//         $dictionary->$key = $this->_pageDictionary->$key->makeClone($factory->getFactory(),

//                                                                     $processed,

//                                                                     Zend_Pdf_Element::CLONE_MODE_SKIP_PAGES);

//        }

//

//        $this->_pageDictionary = $factory->newObject($dictionary);

//        $this->_objectFactory  = $factory;

//        $this->_attached       = false;

//        $this->_style          = null;

//        $this->_font           = null;

    }

    /**

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

     * so it can be used within other docs.

     *

     * @internal

     * @param Zend_Pdf_ElementFactory_Interface $factory

     * @param array $processed

     * @return Zend_Pdf_Page

     */

    public function cloneResource($factory, &$processed)

    {

        /** @todo implementation*/

//        // Clone dictionary object.

//        // Do it explicitly to prevent sharing page attributes between different

//        // results of clonePage() operation (other resources are still shared)

//        $dictionary = new Zend_Pdf_Element_Dictionary();

//        foreach ($this->_pageDictionary->getKeys() as $key) {

//            $dictionary->$key = $this->_pageDictionary->$key->makeClone($factory->getFactory(),

//                                                                        $processed,

//                                                                        Zend_Pdf_Element::CLONE_MODE_SKIP_PAGES);

//        }

//

//        $clonedPage = new Zend_Pdf_Page($factory->newObject($dictionary), $factory);

//        $clonedPage->_attached = false;

//

//        return $clonedPage;

    }

    /**

     * Get resource.

     * Used to reference resource in an internal PDF data structures (resource dictionaries)

     *

     * @internal

     * @return Zend_Pdf_Element_Object

     */

    public function getResource()

    {

        return $this->_resource;

    }

    /**

     * Get factory.

     *

     * @internal

     * @return Zend_Pdf_ElementFactory_Interface

     */

    public function getFactory()

    {

        return $this->_objectFactory;

    }

}