<?php

/**
 * @package KantPHP
 * @author  Zhenqiang Zhang <zhenqiang.zhang@hotmail.com>
 * @copyright (c) KantPHP Studio, All rights reserved.
 * @license http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
 */
namespace Kant\Grid;

/**
 * SerialColumn displays a column of row numbers (1-based).
 *
 * To add a SerialColumn to the [[GridView]], add it to the [[GridView::columns|columns]] configuration as follows:
 *
 * ```php
 * 'columns' => [
 * // ...
 * [
 * 'class' => 'Kant\Grid\SerialColumn',
 * // you may configure additional properties here
 * ],
 * ]
 * ```
 *
 * For more details and usage information on SerialColumn, see the [guide article on data widgets](guide:output-data-widgets).
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class SerialColumn extends Column
{

    /**
     * @inheritdoc
     */
    public $header = '#';

    /**
     * @inheritdoc
     */
    protected function renderDataCellContent($model, $key, $index)
    {
        $pagination = $this->grid->dataProvider->getPagination();
        if ($pagination !== false) {
            return $pagination->getOffset() + $index + 1;
        } else {
            return $index + 1;
        }
    }
}
