public function render()
{
$pageUid = $this->arguments['pageUid'];
$parentInstance = $this->retrieveReconfiguredParentMenuInstance($pageUid);
if (null === $parentInstance) {
return null;
}
$parentArguments = $parentInstance->getArguments();
$isActive = $this->pageService->isActive($pageUid);
// Note about next case: although $isCurrent in most cases implies $isActive, cases where the menu item
// that is being rendered is in fact the current page but is NOT part of the rootline of the menu being
// rendered - which is expected for example if using a page setting to render a different page in menus.
// This means that the following check although it appears redundant, it is in fact not.
$isCurrent = $this->pageService->isCurrent($pageUid);
$isExpanded = (bool) (true === (bool) $parentArguments['expandAll']);
$shouldRender = (bool) (true === $isActive || true === $isCurrent || true === $isExpanded);
if (false === $shouldRender) {
return null;
}
// retrieve the set of template variables which were in play when the parent menu VH started rendering.
$variables = $this->viewHelperVariableContainer->get(AbstractMenuViewHelper::class, 'variables');
$parentInstance->setOriginal(false);
$content = $parentInstance->render();
// restore the previous set of variables after they most likely have changed during the render() above.
foreach ($variables as $name => $value) {
if (true === $this->templateVariableContainer->exists($name)) {
$this->templateVariableContainer->remove($name);
$this->templateVariableContainer->add($name, $value);
}
}
return $content;
}
