public function RulesConditionalElement::getPreviousSibling in Conditional Rules 8

Same name and namespace in other branches

1. 7 includes/rules_conditional.core.inc \RulesConditionalElement::getPreviousSibling()

Gets the previous sibling element.

Return value

RulesPlugin

5 calls to RulesConditionalElement::getPreviousSibling()

RulesConditionalCase::canEvaluate in includes/rules_conditional.plugin.inc

Determines whether this branch can be evaluated.

RulesConditionalDefaultCase::canEvaluate in includes/rules_conditional.plugin.inc

Determines whether this branch can be evaluated.

RulesConditionalElement::checkSiblings in includes/rules_conditional.core.inc

Checks basic conditional element integrity.

RulesConditionalIf::exportPredicate in includes/rules_conditional.plugin.inc

Exports predicate.

RulesConditionalIf::pluginLabel in includes/rules_conditional.plugin.inc

File

includes/rules_conditional.core.inc, line 266

Conditional Rules framework implementation.

Class

RulesConditionalElement

Base conditional element plugin implementation.

Code

public function getPreviousSibling() {
  if (isset($this->parent) && method_exists($this->parent, 'getIterator')) {
    $previous = NULL;
    foreach ($this->parent
      ->getIterator() as $element) {
      if ($element === $this) {
        return $previous;
      }
      $previous = $element;
    }
  }

  // Otherwise, return nothing if no previous sibling is applicable.
  return NULL;
}