/**
* Add the "another subsite" to the list of link types
* @param Form $form
*/
public function updateLinkForm(&$form)
{
$fields = $form->Fields();
$internaltype = $fields->dataFieldByName('LinkType');
$sources = $internaltype->getSource();
$sources['subsite'] = 'Another subsite';
$internaltype->setSource($sources);
$pageSelectionField = SubsitesTreeDropdownField::create("HTMLEditorSubsite", _t('VirtualPage.CHOOSE', "Choose a page to link to"), "SiteTree", "ID", "MenuTitle");
// fetch the subsite paramater from the GET paramater
$subsiteID = Controller::curr() ? Controller::curr()->getRequest()->getVar('HTMLEditorSubsite_SubsiteID') : 0;
$pageSelectionField->setSubsiteID($subsiteID);
$pageSelectionField->setForm($form);
$pageSelectionField->addExtraClass('subsiteSubSelectionTree');
$fields->insertAfter($pageSelectionField, 'Description');
$fields->insertAfter(DropdownField::create('HTMLEditorSubsite_SubsiteID', 'Link across subsite', $this->listSubSites()), 'Description');
Requirements::javascript(SUBSITES_DOMAINS_DIR . '/javascript/subsites-domains.js');
}
