public function Matrix::getElementAbove in Business Rules 2.x

Same name and namespace in other branches

1. 8 src/Util/Flowchart/Matrix.php \Drupal\business_rules\Util\Flowchart\Matrix::getElementAbove()

Get the element above in the matrix.

Parameters

\Drupal\business_rules\Util\Flowchart\Element $element: The element.

Return value

null|\Drupal\business_rules\Util\Flowchart\Element The element.

File

src/Util/Flowchart/Matrix.php, line 81

Class

Matrix

The matrix to handle the Business Rule flowchart.

Namespace

Drupal\business_rules\Util\Flowchart

Code

public function getElementAbove(Element $element) {
  $cell = $this
    ->getCellByElementUuid($element
    ->getUuid());
  $x = $cell['index_x'];
  $y = $cell['index_y'];

  // Check to avoid offset.
  if ($y === 0) {
    return NULL;
  }
  $cell_above = $this->matrix[$x][$y - 1];
  if ($cell_above['element'] instanceof Element) {
    return $cell_above['element'];
  }
  else {
    return NULL;
  }
}