Contao\DataContainer::generateGlobalButtons PHP Method

    protected function generateGlobalButtons()
    {
        if (!is_array($GLOBALS['TL_DCA'][$this->strTable]['list']['global_operations'])) {
            return '';
        }
        $return = '';
        foreach ($GLOBALS['TL_DCA'][$this->strTable]['list']['global_operations'] as $k => $v) {
            if (\Input::get('act') == 'select' && !$v['showOnSelect']) {
                continue;
            }
            $v = is_array($v) ? $v : array($v);
            $label = is_array($v['label']) ? $v['label'][0] : $v['label'];
            $title = is_array($v['label']) ? $v['label'][1] : $v['label'];
            $attributes = $v['attributes'] != '' ? ' ' . ltrim($v['attributes']) : '';
            // Custom icon (see #5541)
            if ($v['icon']) {
                $v['class'] = trim($v['class'] . ' header_icon');
                // Add the theme path if only the file name is given
                if (strpos($v['icon'], '/') === false) {
                    $v['icon'] = \Image::getPath($v['icon']);
                }
                $attributes = sprintf('style="background-image:url(\'%s%s\')"', TL_ASSETS_URL, $v['icon']) . $attributes;
            }
            if ($label == '') {
                $label = $k;
            }
            if ($title == '') {
                $title = $label;
            }
            // Call a custom function instead of using the default button
            if (is_array($v['button_callback'])) {
                $this->import($v['button_callback'][0]);
                $return .= $this->{$v['button_callback'][0]}->{$v['button_callback'][1]}($v['href'], $label, $title, $v['class'], $attributes, $this->strTable, $this->root);
                continue;
            } elseif (is_callable($v['button_callback'])) {
                $return .= $v['button_callback']($v['href'], $label, $title, $v['class'], $attributes, $this->strTable, $this->root);
                continue;
            }
            $return .= '<a href="' . $this->addToUrl($v['href']) . '" class="' . $v['class'] . '" title="' . \StringUtil::specialchars($title) . '"' . $attributes . '>' . $label . '</a> ';
        }
        return $return;
    }