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 

    12 /**

    13  * Marks a section of a template to be escaped or not.

    14  *

    15  * <pre>

    16  * {% autoescape true %}

    17  *   Everything will be automatically escaped in this block

    18  * {% endautoescape %}

    19  *

    20  * {% autoescape false %}

    21  *   Everything will be outputed as is in this block

    22  * {% endautoescape %}

    23  *

    24  * {% autoescape true js %}

    25  *   Everything will be automatically escaped in this block

    26  *   using the js escaping strategy

    27  * {% endautoescape %}

    28  * </pre>

    29  */

    30 class Twig_TokenParser_AutoEscape extends Twig_TokenParser

    31 {

    32     /**

    33      * Parses a token and returns a node.

    34      *

    35      * @param Twig_Token $token A Twig_Token instance

    36      *

    37      * @return Twig_NodeInterface A Twig_NodeInterface instance

    38      */

    39     public function parse(Twig_Token $token)

    40     {

    41         $lineno = $token->getLine();

    42         $value = $this->parser->getStream()->expect(Twig_Token::NAME_TYPE)->getValue();

    43         if (!in_array($value, array('true', 'false'))) {

    44             throw new Twig_Error_Syntax("Autoescape value must be 'true' or 'false'", $lineno);

    45         }

    46         $value = 'true' === $value ? 'html' : false;

    47 

    48         if ($this->parser->getStream()->test(Twig_Token::NAME_TYPE)) {

    49             if (false === $value) {

    50                 throw new Twig_Error_Syntax('Unexpected escaping strategy as you set autoescaping to false.', $lineno);

    51             }

    52 

    53             $value = $this->parser->getStream()->next()->getValue();

    54         }

    55 

    56         $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);

    57         $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);

    58         $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);

    59 

    60         return new Twig_Node_AutoEscape($value, $body, $lineno, $this->getTag());

    61     }

    62 

    63     public function decideBlockEnd(Twig_Token $token)

    64     {

    65         return $token->test('endautoescape');

    66     }

    67 

    68     /**

    69      * Gets the tag name associated with this token parser.

    70      *

    71      * @param string The tag name

    72      */

    73     public function getTag()

    74     {

    75         return 'autoescape';

    76     }

    77 }