/**
* {@inheritDoc}
*/
public function setIterator(IIterator $iterator)
{
$this->iterator = $iterator;
$iterator->setDescendCallback(array($this, 'onStepDown'));
$iterator->setAscendCallback(array($this, 'onStepUp'));
return $this;
}
/**
* Builds fake item structure by looping through iterator.
*
* @param IIterator $iterator
* @param IItem $root
*
* @return IItem
*/
public function getProxy(IIterator $iterator, IItem $root)
{
$depth = 0;
// Set iterator callbacks
$stepDown = function () use(&$depth) {
$depth++;
};
$stepUp = function () use(&$depth) {
$depth--;
};
$iterator->setDescendCallback($stepDown);
$iterator->setAscendCallback($stepUp);
// Create root item
$proxyRoot = $root->isolatedClone();
// Setup loop starting values
$currentItem = $proxyRoot;
$lastItem = $proxyRoot;
$lastDepth = $depth;
foreach ($iterator as $item) {
/** @var $item IItem */
$proxy = $item->isolatedClone();
// Descended
if ($lastDepth < $depth) {
$currentItem = $lastItem;
}
// Ascended
if ($lastDepth > $depth) {
for ($i = 0; $i < $lastDepth - $depth; $i++) {
$currentItem = $currentItem->getParent();
}
}
$currentItem->addChild($proxy);
$lastItem = $proxy;
$lastDepth = $depth;
}
return $proxyRoot;
}
/**
* Gets current item
*
* @return IItem
*/
public function current()
{
return $this->currentIterator->current();
}