/**
* Function: decodeCell
*
* Decodes cells that have been encoded using inversion, ie.
* where the user object is the enclosing node in the XML,
* and restores the group and graph structure in the cells.
* Returns a new <mxCell> instance that represents the
* given node.
*
* Parameters:
*
* node - XML node that contains the cell data.
* restoreStructures - Optional boolean indicating whether
* the graph structure should be restored by calling insert
* and insertEdge on the parent and terminals, respectively.
* Default is true.
*/
function decodeCell($node, $restoreStructures = true)
{
$cell = null;
if (isset($node) && $node->nodeType == XML_ELEMENT_NODE) {
// Tries to find a codec for the given node name. If that does
// not return a codec then the node is the user object (an XML node
// that contains the mxCell, aka inversion).
$decoder = mxCodecRegistry::getCodec($node->nodeName);
// Tries to find the codec for the cell inside the user object.
// This assumes all node names inside the user object are either
// not registered or they correspond to a class for cells.
if (!isset($decoder)) {
$child = $node->firstChild;
while (isset($child) && !$decoder instanceof mxCellCodec) {
$decoder = mxCodecRegistry::getCodec($child->nodeName);
$child = $child->nextSibling;
}
}
if (!$decoder instanceof mxCellCodec) {
$decoder = mxCodecRegistry::getCodec("mxCell");
}
$cell = $decoder->decode($this, $node);
if ($restoreStructures) {
$this->insertIntoGraph($cell);
}
}
return $cell;
}
