typo3/sysext/fluid/Classes/ViewHelpers/CaseViewHelper.php

   1 <?php
   2 namespace TYPO3\CMS\Fluid\ViewHelpers;
   3
   4 /*                                                                        *
   5  * This script is backported from the TYPO3 Flow package "TYPO3.Fluid".   *
   6  *                                                                        *
   7  * It is free software; you can redistribute it and/or modify it under    *
   8  * the terms of the GNU Lesser General Public License, either version 3   *
   9  *  of the License, or (at your option) any later version.                *
  10  *                                                                        *
  11  * The TYPO3 project - inspiring people to share!                         *
  12  *                                                                        */
  13
  14 /**
  15  * Case view helper that is only usable within the SwitchViewHelper.
  16  * @see \TYPO3\CMS\Fluid\ViewHelpers\SwitchViewHelper
  17  *
  18  * @api
  19  */
  20 class CaseViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper {
  21
  22         /**
  23          * @param mixed $value
  24          * @return string the contents of this view helper if $value equals the expression of the surrounding switch view helper, otherwise an empty string
  25          * @throws \TYPO3\CMS\Fluid\Core\ViewHelper\Exception
  26          * @api
  27          */
  28         public function render($value) {
  29                 $viewHelperVariableContainer = $this->renderingContext->getViewHelperVariableContainer();
  30                 if (!$viewHelperVariableContainer->exists('TYPO3\CMS\Fluid\ViewHelpers\SwitchViewHelper', 'switchExpression')) {
  31                         throw new \TYPO3\CMS\Fluid\Core\ViewHelper\Exception('The case View helper can only be used within a switch View helper', 1368112037);
  32                 }
  33                 $switchExpression = $viewHelperVariableContainer->get('TYPO3\CMS\Fluid\ViewHelpers\SwitchViewHelper', 'switchExpression');
  34
  35                 // non-type-safe comparison by intention
  36                 if ($switchExpression == $value) {
  37                         $viewHelperVariableContainer->addOrUpdate('TYPO3\CMS\Fluid\ViewHelpers\SwitchViewHelper', 'break', TRUE);
  38                         return $this->renderChildren();
  39                 }
  40                 return '';
  41         }
  42 }