1 <?php

     2 

     3 /*

     4  * This file is part of Twig.

     5  *

     6  * (c) 2010 Fabien Potencier

     7  *

     8  * For the full copyright and license information, please view the LICENSE

     9  * file that was distributed with this source code.

    10  */

    11 

    12 /**

    13  * Represents a template function.

    14  *

    15  * @package    twig

    16  * @author     Fabien Potencier <fabien@symfony.com>

    17  */

    18 abstract class Twig_Function implements Twig_FunctionInterface

    19 {

    20     protected $options;

    21 

    22     public function __construct(array $options = array())

    23     {

    24         $this->options = array_merge(array(

    25             'needs_environment' => false,

    26             'needs_context'     => false,

    27         ), $options);

    28     }

    29 

    30     public function needsEnvironment()

    31     {

    32         return $this->options['needs_environment'];

    33     }

    34 

    35     public function needsContext()

    36     {

    37         return $this->options['needs_context'];

    38     }

    39 

    40     public function getSafe(Twig_Node $functionArgs)

    41     {

    42         if (isset($this->options['is_safe'])) {

    43             return $this->options['is_safe'];

    44         }

    45 

    46         if (isset($this->options['is_safe_callback'])) {

    47             return call_user_func($this->options['is_safe_callback'], $functionArgs);

    48         }

    49 

    50         return array();

    51     }

    52 }