/**
* Renders hidden form fields for referrer information about
* the current request.
*
* @return string Hidden fields with referrer information
*/
protected function renderHiddenReferrerFields()
{
$tagBuilder = new TagBuilder('input');
$tagBuilder->addAttribute('type', 'hidden');
$tagBuilder->addAttribute('name', $this->prefixFieldName('__state'));
$serializedFormState = base64_encode(serialize($this->arguments['object']->getFormState()));
$tagBuilder->addAttribute('value', $this->hashService->appendHmac($serializedFormState));
return $tagBuilder->render();
}
/**
* Renders an option tag
*
* @param string $value
* @param null | string $label
* @param bool $selected
* @return string
*/
private function renderOptionTag($value, $label = null, $selected = false)
{
$option = new TagBuilder("option");
$option->addAttribute('value', $value);
$option->setContent(!is_null($label) ? $label : $value);
if ($selected) {
$option->addAttribute('selected', 'selected');
}
return $option->render();
}
public function render()
{
$this->tag->addAttribute('action', $this->arguments['action']);
$hiddenFields = array();
/** @var FormField $hiddenField */
foreach ($this->arguments['form']->getHiddenFields() as $hiddenField) {
$tag = new TagBuilder('input');
$tag->addAttributes(['type' => 'hidden', 'name' => $hiddenField->getName(), 'value' => $hiddenField->getValueOrDefault()]);
$hiddenFields[] = $tag->render();
}
$content = implode(chr(10), $hiddenFields) . chr(10) . $this->renderChildren();
$this->tag->setContent($content);
$output = $this->tag->render();
return $output;
}
/**
* @test
*/
public function tagIsNotRenderedIfTagNameIsEmpty()
{
$tagBuilder = new TagBuilder('foo');
$tagBuilder->setTagName('');
$this->assertEquals('', $tagBuilder->render());
}
