function csl_group::render in Bibliography Module 7.2

Same name and namespace in other branches

1. 6.2 modules/CiteProc/CSL.inc \csl_group::render()
2. 7 modules/CiteProc/CSL.inc \csl_group::render()

Overrides csl_rendering_element::render

File

modules/CiteProc/CSL.inc, line 1211

Class

csl_group

Code

function render($data, $mode = NULL) {
  $text = '';
  $text_parts = array();
  $terms = $variables = $have_variables = $element_count = 0;
  foreach ($this->elements as $element) {
    $element_count++;
    if ($element instanceof csl_text && ($element->source == 'term' || $element->source == 'value')) {
      $terms++;
    }
    if ($element instanceof csl_label) {
      $terms++;
    }
    if ($element->source == 'variable' && isset($element->variable) && !empty($data->{$element->variable})) {
      $variables++;
    }
    $text = $element
      ->render($data, $mode);
    $delimiter = $this->delimiter;
    if (!empty($text)) {
      if ($delimiter && $element_count < count($this->elements)) {

        //check to see if the delimiter is already the last character of the text string

        //if so, remove it so we don't have two of them when we paste together the group
        $stext = strip_tags(trim($text));
        if (strrpos($stext, $delimiter[0]) + 1 == drupal_strlen($stext)) {
          $text = str_replace($stext, '----REPLACE----', $text);
          $stext = drupal_substr($stext, 0, -1);
          $text = str_replace('----REPLACE----', $stext, $text);
        }
      }
      $text_parts[] = $text;
      if ($element->source == 'variable' || isset($element->variable)) {
        $have_variables++;
      }
      if ($element->source == 'macro') {
        $have_variables++;
      }
    }
  }
  if (empty($text_parts)) {
    return;
  }
  if ($variables && !$have_variables) {
    return;
  }

  // there has to be at least one other none empty value before the term is output
  if (count($text_parts) == $terms) {
    return;
  }

  // there has to be at least one other none empty value before the term is output
  $delimiter = $this->delimiter;
  $text = implode($delimiter, $text_parts);

  // insert the delimiter if supplied.
  return $this
    ->format($text);
}