/**
* Function: isReference
*
* Returns true if the given fieldname is to be treated
* as a textual reference (ID). This implementation returns
* true if the given fieldname is in <idrefs>.
*
* Parameters:
*
* obj - Object instance that contains the field.
* attr - Fieldname of the field.
* value - Value of the field.
* write - Boolean indicating if the field is being encoded or decoded.
* Write is true if the field is being encoded, else it is being decoded.
*/
function isReference($obj, $attr, $value, $write)
{
return mxUtils::indexOf($this->idrefs, $attr) >= 0;
}
/**
* Function: insertEdge
*
* Inserts the specified edge into the edge array and returns the edge.
* Will update the respective terminal reference of the edge.
*
* Parameters:
*
* edge - <mxCell> to be inserted into the edge array.
* outgoing - Boolean that specifies if the edge is outgoing.
*/
function insertEdge($edge, $outgoing)
{
if (isset($edge)) {
$edge->removeFromTerminal($outgoing);
$edge->setTerminal($this, $outgoing);
if ($this->edges == null || $edge->getTerminal(!$outgoing) !== $this || mxUtils::indexOf($this->edges, $edge) < 0) {
if ($this->edges == null) {
$this->edges = array();
}
array_push($this->edges, $edge);
}
}
return $edge;
}