/**
* Moves the current position to the next QtiComponent object to be
* traversed.
*/
public function next()
{
if ($this->trailCount > 0) {
while ($this->trailCount > 0) {
$trailEntry = $this->popFromTrail();
$component = $trailEntry[1];
$source = $trailEntry[0];
if ($this->isTraversed($component) === false) {
$this->currentComponent = $component;
$this->currentContainer = $source;
$this->pushOnTrail($component, $this->currentComponent->getComponents());
$this->markTraversed($this->currentComponent);
if (empty($this->classes) === true || in_array($this->currentComponent->getQTIClassName(), $this->classes) === true) {
// If all classes are seeked or the current component has a class name
// that must be seeked, stop the iteration.
return;
}
}
}
$this->isValid = false;
$this->currentContainer = null;
} else {
$this->isValid = false;
$this->currentContainer = null;
}
}
/**
* Get the renderings related to the children of $component.
*
* @param QtiComponent $component A QtiComponent object to be rendered.
* @return array
*/
public function getChildrenRenderings(QtiComponent $component)
{
$returnValue = array();
foreach (array_reverse($component->getComponents()->getArrayCopy()) as $c) {
if (count($this->getRenderingStack()) > 0) {
list($renderedComponent, $rendering) = $this->getRenderingStack()->pop();
if ($c === $renderedComponent) {
array_unshift($returnValue, $rendering);
} else {
// repush...
$this->storeRendering($renderedComponent, $rendering);
}
}
}
return $returnValue;
}
