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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\widgets;
use Yii;
use yii\base\InvalidConfigException;
use yii\base\Widget;
use yii\data\Sort;
use yii\helpers\Html;
/**
* LinkSorter renders a list of sort links for the given sort definition.
*
* LinkSorter will generate a hyperlink for every attribute declared in [[sort]].
*
* For more details and usage information on LinkSorter, see the [guide article on sorting](guide:output-sorting).
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class LinkSorter extends Widget
{
/**
* @var Sort the sort definition
*/
public $sort;
/**
* @var array list of the attributes that support sorting. If not set, it will be determined
* using [[Sort::attributes]].
*/
public $attributes;
/**
* @var array HTML attributes for the sorter container tag.
* @see \yii\helpers\Html::ul() for special attributes.
* @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
*/
public $options = ['class' => 'sorter'];
/**
* @var array HTML attributes for the link in a sorter container tag which are passed to [[Sort::link()]].
* @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
* @since 2.0.6
*/
public $linkOptions = [];
/**
* Initializes the sorter.
*/
public function init()
{
parent::init();
if ($this->sort === null) {
throw new InvalidConfigException('The "sort" property must be set.');
}
}
/**
* Executes the widget.
* This method renders the sort links.
*/
public function run()
{
echo $this->renderSortLinks();
}
/**
* Renders the sort links.
* @return string the rendering result
*/
protected function renderSortLinks()
{
$attributes = empty($this->attributes) ? array_keys($this->sort->attributes) : $this->attributes;
$links = [];
foreach ($attributes as $name) {
$links[] = $this->sort->link($name, $this->linkOptions);
}
return Html::ul($links, array_merge($this->options, ['encode' => false]));
}
}