1 <?php

     2 /**

     3  * Zend Framework

     4  *

     5  * LICENSE

     6  *

     7  * This source file is subject to the new BSD license that is bundled

     8  * with this package in the file LICENSE.txt.

     9  * It is also available through the world-wide-web at this URL:

    10  * http://framework.zend.com/license/new-bsd

    11  * If you did not receive a copy of the license and are unable to

    12  * obtain it through the world-wide-web, please send an email

    13  * to license@zend.com so we can send you a copy immediately.

    14  *

    15  * @category   Zend

    16  * @package    Zend_Pdf

    17  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

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

    19  * @version    $Id: Image.php 20096 2010-01-06 02:05:09Z bkarwin $

    20  */

    21 

    22 

    23 /** Internally used classes */

    24 require_once 'Zend/Pdf/Element/Object.php';

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

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

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

    28 

    29 

    30 /** Zend_Pdf_Resource */

    31 require_once 'Zend/Pdf/Resource.php';

    32 

    33 

    34 /**

    35  * Content stream (drawing instructions container)

    36  *

    37  * @package    Zend_Pdf

    38  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

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

    40  */

    41 class Zend_Pdf_Resource_ContentStream extends Zend_Pdf_Resource

    42 {

    43     /**

    44      * Buffered content

    45      *

    46      * @var string

    47      */

    48     protected $_bufferedContent = '';

    49 

    50     /**

    51      * Object constructor.

    52      *

    53      * @param Zend_Pdf_Element_Object_Stream|string $contentStreamObject

    54      * @throws Zend_Pdf_Exception

    55      */

    56     public function __construct($contentStreamObject = '')

    57     {

    58         if ($contentStreamObject !== null &&

    59             !$contentStreamObject instanceof Zend_Pdf_Element_Object_Stream &&

    60             !is_string($contentStreamObject)

    61         ) {

    62             require_once 'Zend/Pdf/Exception.php';

    63             throw new Zend_Pdf_Exception('Content stream parameter must be a string or stream object');

    64         }

    65 

    66         parent::__construct($contentStreamObject);

    67     }

    68 

    69     /**

    70      * Appends instructions to the end of the content stream

    71      *

    72      * @param string $instructions

    73      * @return Zend_Pdf_Resource_ContentStream

    74      */

    75     public function addInstructions($instructions)

    76     {

    77         $this->_bufferedContent .= $instructions;

    78         return $this;

    79     }

    80 

    81     /**

    82      * Get current stream content

    83      *

    84      * @return string

    85      */

    86     public function getInstructions()

    87     {

    88         $this->flush();

    89         return $this->_resource->value;

    90     }

    91 

    92     /**

    93      * Clear stream content.

    94      *

    95      * @return Zend_Pdf_Resource_ContentStream

    96      */

    97     public function clear()

    98     {

    99         $this->_resource->value = '';

   100         $this->_bufferedContent = '';

   101         return $this;

   102     }

   103 

   104     /**

   105      * Flush buffered content

   106      */

   107     public function flush()

   108     {

   109         $this->_resource->value .= $this->_bufferedContent;

   110         $this->_bufferedContent = '';

   111 

   112         return $this;

   113     }

   114 }