Method getInput

/**
 * Method to get the field input markup.
 *
 * @return  string  The field input markup.
 *
 * @since   3.6
 */
protected function getInput()
{
    // Prepare data for renderer
    $data = $this->getLayoutData();
    $tmpl = null;
    $control = $this->name;
    try {
        $tmpl = $this->loadSubForm();
        $forms = $this->loadSubFormData($tmpl);
    } catch (\Exception $e) {
        return $e->getMessage();
    }
    $data['tmpl'] = $tmpl;
    $data['forms'] = $forms;
    $data['min'] = $this->min;
    $data['max'] = $this->max;
    $data['control'] = $control;
    $data['buttons'] = $this->buttons;
    $data['fieldname'] = $this->fieldname;
    $data['fieldId'] = $this->id;
    $data['groupByFieldset'] = $this->groupByFieldset;
    /**
     * For each rendering process of a subform element, we want to have a
     * separate unique subform id present to could distinguish the eventhandlers
     * regarding adding/moving/removing rows from nested subforms from their parents.
     */
    static $unique_subform_id = 0;
    $data['unique_subform_id'] = 'sr-' . $unique_subform_id++;
    // Prepare renderer
    $renderer = $this->getRenderer($this->layout);
    // Allow to define some Layout options as attribute of the element
    if ($this->element['component']) {
        $renderer->setComponent((string) $this->element['component']);
    }
    if ($this->element['client']) {
        $renderer->setClient((string) $this->element['client']);
    }
    // Render
    $html = $renderer->render($data);
    // Add hidden input on front of the subform inputs, in multiple mode
    // for allow to submit an empty value
    if ($this->multiple) {
        $html = '<input name="' . $this->name . '" type="hidden" value="">' . $html;
    }
    return $html;
}