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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) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id: Style.php 20096 2010-01-06 02:05:09Z bkarwin $
  */
 
 // require_once 'Zend/Pdf/Canvas/Abstract.php';
 
 /**
  * Canvas is an abstract rectangle drawing area which can be dropped into
  * page object at specified place.
  *
  * @package    Zend_Pdf
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Pdf_Canvas extends Zend_Pdf_Canvas_Abstract
 {
     /**
      * Canvas procedure sets.
      *
      * Allowed values: 'PDF', 'Text', 'ImageB', 'ImageC', 'ImageI'.
      *
      * @var array
      */
     protected $_procSet = array();
 
     /**
      * Canvas width expressed in default user space units (1/72 inch)
      *
      * @var float
      */
     protected $_width;
 
     /**
      * Canvas height expressed in default user space units (1/72 inch)
      *
      * @var float
      */
     protected $_height;
 
     protected $_resources = array('Font'      => array(),
                                   'XObject'   => array(),
                                   'ExtGState' => array());
 
     /**
      * Object constructor
      *
      * @param float $width
      * @param float $height
      */
     public function __construct($width, $height)
     {
         $this->_width  = $width;
         $this->_height = $height;
     }
 
     /**
      * Add procedure set to the canvas description
      *
      * @param string $procSetName
      */
     protected function _addProcSet($procSetName)
     {
         $this->_procset[$procSetName] = 1;
     }
 
     /**
      * Attach resource to the canvas
      *
      * Method returns a name of the resource which can be used
      * as a resource reference within drawing instructions stream
      * Allowed types: 'ExtGState', 'ColorSpace', 'Pattern', 'Shading',
      * 'XObject', 'Font', 'Properties'
      *
      * @param string $type
      * @param Zend_Pdf_Resource $resource
      * @return string
      */
     protected function _attachResource($type, Zend_Pdf_Resource $resource)
     {
         // Check, that resource is already attached to resource set.
         $resObject = $resource->getResource();
         foreach ($this->_resources[$type] as $resName => $collectedResObject) {
             if ($collectedResObject === $resObject) {
                 return $resName;
             }
         }
 
         $idCounter = 1;
         do {
             $newResName = $type[0] . $idCounter++;
         } while (isset($this->_resources[$type][$newResName]));
 
         $this->_resources[$type][$newResName] = $resObject;
 
         return $newResName;
     }
 
     /**
      * Returns dictionaries of used resources.
      *
      * Used for canvas implementations interoperability
      *
      * Structure of the returned array:
      * array(
      *   <resTypeName> => array(
      *                      <resName> => <Zend_Pdf_Resource object>,
      *                      <resName> => <Zend_Pdf_Resource object>,
      *                      <resName> => <Zend_Pdf_Resource object>,
      *                      ...
      *                    ),
      *   <resTypeName> => array(
      *                      <resName> => <Zend_Pdf_Resource object>,
      *                      <resName> => <Zend_Pdf_Resource object>,
      *                      <resName> => <Zend_Pdf_Resource object>,
      *                      ...
      *                    ),
      *   ...
      *   'ProcSet' => array()
      * )
      *
      * where ProcSet array is a list of used procedure sets names (strings).
      * Allowed procedure set names: 'PDF', 'Text', 'ImageB', 'ImageC', 'ImageI'
      *
      * @internal
      * @return array
      */
     public function getResources()
     {
         $this->_resources['ProcSet'] = array_keys($this->_procSet);
         return $this->_resources;
     }
 
     /**
      * Get drawing instructions stream
      *
      * It has to be returned as a PDF stream object to make it reusable.
      *
      * @internal
      * @returns Zend_Pdf_Resource_ContentStream
      */
     public function getContents()
     {
         /** @todo implementation */
     }
 
     /**
      * Return the height of this page in points.
      *
      * @return float
      */
     public function getHeight()
     {
         return $this->_height;
     }
 
     /**
      * Return the width of this page in points.
      *
      * @return float
      */
     public function getWidth()
     {
         return $this->_width;
     }
 }