yf_html5fw_empty class

    public function form_dd_row($content, $extra = [], $replace = [], $form = null)
    {
        // TODO
        return $this->form_row($content, $extra, $replace, $form = null);
    }

    public function form_render_out($content, $extra = [], $replace = [], $form = null)
    {
        return $content;
    }

    public function form_row($content, $extra = [], $replace = [], $form = null)
    {
        $row_start =
            '<div>' . PHP_EOL
                . (($extra['desc'] ?? null) && ! ($extra['no_label'] ?? null) ? '<label for="' . ($extra['id'] ?? null) . '">' . t($extra['desc'] ?? null) . '</label>' . PHP_EOL : '')
                . ( ! ($extra['wide'] ?? null) ? '<div>' . PHP_EOL : '');

        $row_end =
                ( ! ($extra['wide'] ?? null) ? '</div>' . PHP_EOL : '')
            . '</div>' . PHP_EOL;

        $before_content_html = '';
        $after_content_html = '';

        $edit_link_html = (($extra['edit_link'] ?? null) ? ' <a href="' . _escape_tpl_braces(_htmlchars($extra['edit_link'])) . '"><i></i> ' . t('Edit') . '</a>' . PHP_EOL : '');
        $link_name_html = ((($extra['link_url'] ?? null) && ($extra['link_name'] ?? null)) ? ' <a href="' . ($extra['link_url'] ?? null) . '">' . t($extra['link_name'] ?? null) . '</a>' . PHP_EOL : '');

        $inline_help_html = (($extra['inline_help'] ?? null) ? '<span>' . ($extra['inline_help'] ?? null) . '</span>' . PHP_EOL : '');
        $inline_tip_html = (($extra['tip'] ?? null) ? ' ' . tip(($extra['tip'] ?? null), $replace) : '');

        if ($extra['only_row_start'] ?? null) {
            return $row_start;
        } elseif ($extra['only_row_end'] ?? null) {
            return $row_end;
        } elseif ($extra['stacked'] ?? null) {
            return $before_content_html . $content . PHP_EOL . $after_content_html
                . $edit_link_html . $link_name_html . $inline_help_html . $inline_tip_html;
        }
        // Full variant
        return $row_start
                    . $before_content_html . $content . PHP_EOL . $after_content_html
                    . $edit_link_html . $link_name_html . $inline_help_html . $inline_tip_html
                    . $this->_add_rich_editor($extra, $replace, $form)
                . $row_end;
    }

    public function _add_rich_editor($extra = [], $replace = [], $form = null)
    {
        $out = [];
        if (isset($extra['ace_editor']) && $extra['ace_editor']) {
            $out[] = $form->_ace_editor_html($extra, $replace);
        }
        if (isset($extra['ckeditor']) && $extra['ckeditor']) {
            $out[] = $form->_ckeditor_html($extra, $replace);
        }
        if (isset($extra['tinymce']) && $extra['tinymce']) {
            $out[] = $form->_tinymce_html($extra, $replace);
        }
        return implode(PHP_EOL, $out);
    }