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/vendor/symfony/twig-bridge/Node/ -> SearchAndRenderBlockNode.php (source)

   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   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  namespace Symfony\Bridge\Twig\Node;
  13  
  14  use Twig\Compiler;
  15  use Twig\Node\Expression\ArrayExpression;
  16  use Twig\Node\Expression\ConstantExpression;
  17  use Twig\Node\Expression\FunctionExpression;
  18  
  19  /**
  20   * @author Bernhard Schussek <bschussek@gmail.com>
  21   */
  22  class SearchAndRenderBlockNode extends FunctionExpression
  23  {
  24      public function compile(Compiler $compiler)
  25      {
  26          $compiler->addDebugInfo($this);
  27          $compiler->raw('$this->env->getExtension(\'Symfony\Bridge\Twig\Extension\FormExtension\')->renderer->searchAndRenderBlock(');
  28  
  29          preg_match('/_([^_]+)$/', $this->getAttribute('name'), $matches);
  30  
  31          $label = null;
  32          $arguments = iterator_to_array($this->getNode('arguments'));
  33          $blockNameSuffix = $matches[1];
  34  
  35          if (isset($arguments[0])) {
  36              $compiler->subcompile($arguments[0]);
  37              $compiler->raw(', \''.$blockNameSuffix.'\'');
  38  
  39              if (isset($arguments[1])) {
  40                  if ('label' === $blockNameSuffix) {
  41                      // The "label" function expects the label in the second and
  42                      // the variables in the third argument
  43                      $label = $arguments[1];
  44                      $variables = isset($arguments[2]) ? $arguments[2] : null;
  45                      $lineno = $label->getTemplateLine();
  46  
  47                      if ($label instanceof ConstantExpression) {
  48                          // If the label argument is given as a constant, we can either
  49                          // strip it away if it is empty, or integrate it into the array
  50                          // of variables at compile time.
  51                          $labelIsExpression = false;
  52  
  53                          // Only insert the label into the array if it is not empty
  54                          if (!twig_test_empty($label->getAttribute('value'))) {
  55                              $originalVariables = $variables;
  56                              $variables = new ArrayExpression(array(), $lineno);
  57                              $labelKey = new ConstantExpression('label', $lineno);
  58  
  59                              if (null !== $originalVariables) {
  60                                  foreach ($originalVariables->getKeyValuePairs() as $pair) {
  61                                      // Don't copy the original label attribute over if it exists
  62                                      if ((string) $labelKey !== (string) $pair['key']) {
  63                                          $variables->addElement($pair['value'], $pair['key']);
  64                                      }
  65                                  }
  66                              }
  67  
  68                              // Insert the label argument into the array
  69                              $variables->addElement($label, $labelKey);
  70                          }
  71                      } else {
  72                          // The label argument is not a constant, but some kind of
  73                          // expression. This expression needs to be evaluated at runtime.
  74                          // Depending on the result (whether it is null or not), the
  75                          // label in the arguments should take precedence over the label
  76                          // in the attributes or not.
  77                          $labelIsExpression = true;
  78                      }
  79                  } else {
  80                      // All other functions than "label" expect the variables
  81                      // in the second argument
  82                      $label = null;
  83                      $variables = $arguments[1];
  84                      $labelIsExpression = false;
  85                  }
  86  
  87                  if (null !== $variables || $labelIsExpression) {
  88                      $compiler->raw(', ');
  89  
  90                      if (null !== $variables) {
  91                          $compiler->subcompile($variables);
  92                      }
  93  
  94                      if ($labelIsExpression) {
  95                          if (null !== $variables) {
  96                              $compiler->raw(' + ');
  97                          }
  98  
  99                          // Check at runtime whether the label is empty.
 100                          // If not, add it to the array at runtime.
 101                          $compiler->raw('(twig_test_empty($_label_ = ');
 102                          $compiler->subcompile($label);
 103                          $compiler->raw(') ? array() : array("label" => $_label_))');
 104                      }
 105                  }
 106              }
 107          }
 108  
 109          $compiler->raw(')');
 110      }
 111  }


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