Method addToolbar

/**
 * Add the page title and toolbar.
 *
 * @return  void
 *
 * @since   1.6
 */
protected function addToolbar()
{
    Factory::getApplication()->input->set('hidemainmenu', true);
    $user = Factory::getUser();
    $userId = $user->id;
    $isNew = $this->item->id == 0;
    $viewName = $this->getName();
    $checkedOut = $this->getModel()->isCheckedOut($this->item);
    $canDo = $this->canDo;
    ToolbarHelper::title($this->toolbarTitle, $this->toolbarIcon);
    // For new records, check the create permission.
    if ($isNew && $canDo->get('core.create')) {
        ToolbarHelper::saveGroup([['apply', $viewName . '.apply'], ['save', $viewName . '.save'], ['save2new', $viewName . '.save2new']], 'btn-success');
        ToolbarHelper::cancel($viewName . '.cancel');
    } else {
        // Since it's an existing record, check the edit permission, or fall back to edit own if the owner.
        if (property_exists($this->item, 'created_by')) {
            $itemEditable = $canDo->get('core.edit') || $canDo->get('core.edit.own') && $this->item->created_by == $userId;
        } else {
            $itemEditable = $canDo->get('core.edit');
        }
        $toolbarButtons = [];
        // Can't save the record if it's checked out and editable
        if (!$checkedOut && $itemEditable) {
            $toolbarButtons[] = ['apply', $viewName . '.apply'];
            $toolbarButtons[] = ['save', $viewName . '.save'];
            // We can save this record, but check the create permission to see if we can return to make a new one.
            if ($canDo->get('core.create')) {
                $toolbarButtons[] = ['save2new', $viewName . '.save2new'];
            }
        }
        // If checked out, we can still save
        if ($canDo->get('core.create')) {
            $toolbarButtons[] = ['save2copy', $viewName . '.save2copy'];
        }
        ToolbarHelper::saveGroup($toolbarButtons, 'btn-success');
        if (ComponentHelper::isEnabled('com_contenthistory') && $this->state->params->get('save_history', 0) && $itemEditable) {
            ToolbarHelper::versions($this->option . '.' . $viewName, $this->item->id);
        }
        if (!$isNew && $this->previewLink) {
            ToolbarHelper::preview($this->previewLink, Text::_('JGLOBAL_PREVIEW'), 'eye', 80, 90);
        }
        ToolbarHelper::cancel($viewName . '.cancel', 'JTOOLBAR_CLOSE');
    }
    ToolbarHelper::divider();
    if ($this->helpLink) {
        ToolbarHelper::help($this->helpLink);
    }
}