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Escaper.php (2757B)

      1 <?php
      2 
      3 /*
      4  * This file is part of Twig.
      5  *
      6  * (c) 2009 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 class Twig_Extension_Escaper extends Twig_Extension
     12 {
     13     protected $defaultStrategy;
     14 
     15     /**
     16      * Constructor.
     17      *
     18      * @param string|false|callable $defaultStrategy An escaping strategy
     19      *
     20      * @see setDefaultStrategy()
     21      */
     22     public function __construct($defaultStrategy = 'html')
     23     {
     24         $this->setDefaultStrategy($defaultStrategy);
     25     }
     26 
     27     public function getTokenParsers()
     28     {
     29         return array(new Twig_TokenParser_AutoEscape());
     30     }
     31 
     32     public function getNodeVisitors()
     33     {
     34         return array(new Twig_NodeVisitor_Escaper());
     35     }
     36 
     37     public function getFilters()
     38     {
     39         return array(
     40             new Twig_SimpleFilter('raw', 'twig_raw_filter', array('is_safe' => array('all'))),
     41         );
     42     }
     43 
     44     /**
     45      * Sets the default strategy to use when not defined by the user.
     46      *
     47      * The strategy can be a valid PHP callback that takes the template
     48      * "filename" as an argument and returns the strategy to use.
     49      *
     50      * @param string|false|callable $defaultStrategy An escaping strategy
     51      */
     52     public function setDefaultStrategy($defaultStrategy)
     53     {
     54         // for BC
     55         if (true === $defaultStrategy) {
     56             @trigger_error('Using "true" as the default strategy is deprecated since version 1.21. Use "html" instead.', E_USER_DEPRECATED);
     57 
     58             $defaultStrategy = 'html';
     59         }
     60 
     61         if ('filename' === $defaultStrategy) {
     62             $defaultStrategy = array('Twig_FileExtensionEscapingStrategy', 'guess');
     63         }
     64 
     65         $this->defaultStrategy = $defaultStrategy;
     66     }
     67 
     68     /**
     69      * Gets the default strategy to use when not defined by the user.
     70      *
     71      * @param string $filename The template "filename"
     72      *
     73      * @return string|false The default strategy to use for the template
     74      */
     75     public function getDefaultStrategy($filename)
     76     {
     77         // disable string callables to avoid calling a function named html or js,
     78         // or any other upcoming escaping strategy
     79         if (!is_string($this->defaultStrategy) && false !== $this->defaultStrategy) {
     80             return call_user_func($this->defaultStrategy, $filename);
     81         }
     82 
     83         return $this->defaultStrategy;
     84     }
     85 
     86     public function getName()
     87     {
     88         return 'escaper';
     89     }
     90 }
     91 
     92 /**
     93  * Marks a variable as being safe.
     94  *
     95  * @param string $string A PHP variable
     96  *
     97  * @return string
     98  */
     99 function twig_raw_filter($string)
    100 {
    101     return $string;
    102 }