<?php
  /**
   * @package dompdf
   * @link    http://dompdf.github.com/
   * @author  Benj Carson <benjcarson@digitaljunkies.ca>
   * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
   */
  namespace Dompdf;
  
  use Dompdf\Frame;
  
  /**
   * Executes inline PHP code during the rendering process
   *
   * @package dompdf
   */
  class PhpEvaluator
  {
  
      /**
       * @var Canvas
       */
      protected $_canvas;
  
      function __construct(Canvas $canvas)
      {
          $this->_canvas = $canvas;
      }
  
      function evaluate($code, $vars = array())
      {
          if (!$this->_canvas->get_dompdf()->get_option("enable_php")) {
              return;
          }
  
          // Set up some variables for the inline code
          $pdf = $this->_canvas;
          $fontMetrics = $pdf->get_dompdf()->getFontMetrics();
          $PAGE_NUM = $pdf->get_page_number();
          $PAGE_COUNT = $pdf->get_page_count();
  
          // Override those variables if passed in
          foreach ($vars as $k => $v) {
              $$k = $v;
          }
  
          //$code = html_entity_decode($code); // @todo uncomment this when tested
          eval($code);
      }
  
      function render(Frame $frame)
      {
          $this->evaluate($frame->get_node()->nodeValue);
      }
  }