* @since 2.0
*/
class ListView extends Widget
{
/**
* @var array the HTML attributes for the container tag of the list view.
* The "tag" element specifies the tag name of the container element and defaults to "div".
*/
public $options = array();
/**
* @var \yii\data\IDataProvider the data provider for the view. This property is required.
*/
public $dataProvider;
/**
* @var array the HTML attributes for the container of the rendering result of each data item.
* The "tag" element specifies the tag name of the container element and defaults to "div".
* If "tag" is false, it means no container element will be rendered.
*/
public $itemOptions = array();
/**
* @var string|callback the name of the view for rendering each data item, or a callback (e.g. an anonymous function)
* for rendering each data item. If it specifies a view name, the following variables will
* be available in the view:
*
* - `$item`: mixed, the data item
* - `$key`: mixed, the key value associated with the data item
* - `$index`: integer, the zero-based index of the data item in the items array returned by [[dataProvider]].
* - `$widget`: ListView, this widget instance
*
* Note that the view name is resolved into the view file by the current context of the [[view]] object.
*
* If this property is specified as a callback, it should have the following signature:
*
* ~~~
* function ($item, $key, $index, $widget)
* ~~~
*/
public $itemView;
/**
* @var string the HTML code to be displayed between any two consecutive items.
*/
public $separator = "\n";
/**
* @var array the configuration for the pager widget. By default, [[LinkPager]] will be
* used to render the pager. You can use a different widget class by configuring the "class" element.
*/
public $pager = array();
/**
* @var array the configuration for the sorter widget. By default, [[LinkSorter]] will be
* used to render the sorter. You can use a different widget class by configuring the "class" element.
*/
public $sorter = array();
/**
* @var string the HTML content to be displayed as the summary of the list view.
* If you do not want to show the summary, you may set it with an empty string.
*
* The following tokens will be replaced with the corresponding values:
*
* - `{begin}`: the starting row number (1-based) currently being displayed
* - `{end}`: the ending row number (1-based) currently being displayed
* - `{count}`: the number of rows currently being displayed
* - `{totalCount}`: the total number of rows available
* - `{page}`: the page number (1-based) current being displayed
* - `{pageCount}`: the number of pages available
*/
public $summary;
/**
* @var string the HTML content to be displayed when [[dataProvider]] does not have any data.
* If you do not want to show anything when [[dataProvider]] is empty, you may set this property with an empty string.
*/
public $empty;
/**
* @var string the layout that determines how different sections of the list view should be organized.
* The following tokens will be replaced with the corresponding section contents:
*
* - `{summary}`: the summary section. See [[renderSummary()]].
* - `{items}`: the list items. See [[renderItems()]].
* - `{sorter}`: the sorter. See [[renderSorter()]].
* - `{pager}`: the pager. See [[renderPager()]].
*/
public $layout = "{summary}\n{sorter}\n{items}\n{pager}";
/**
* Initializes the view.
*/
public function init()
{
if ($this->dataProvider === null) {
throw new InvalidConfigException('The "dataProvider" property must be set.');
}
if ($this->empty === null) {
$this->empty = '' . Yii::t('yii', 'No results found.') . '
';
}
}
/**
* Runs the widget.
*/
public function run()
{
if ($this->dataProvider->getCount() > 0) {
$tag = ArrayHelper::remove($this->options, 'tag', 'div');
$content = preg_replace_callback("/{\\w+}/", array($this, 'renderSection'), $this->layout);
echo Html::tag($tag, $content, $this->options);
} else {
echo $this->empty;
}
}
/**
* Renders a section of the list view.
* This method is invoked for every placeholder found in [[layout]].
* It should return the rendering result that would replace the placeholder.
* @param array $matches the matches, where $matches[0] represents the matching placeholder.
* @return string the rendering result of the section
*/
protected function renderSection($matches)
{
switch ($matches[0]) {
case '{summary}': return $this->renderSummary();
case '{items}': return $this->renderItems();
case '{sorter}': return $this->renderSorter();
case '{pager}': return $this->renderPager();
default: return $matches[0];
}
}
/**
* Renders the summary text.
*/
public function renderSummary()
{
$count = $this->dataProvider->getCount();
if (($pagination = $this->dataProvider->getPagination()) !== false) {
$totalCount = $this->dataProvider->getTotalCount();
$begin = $pagination->getPage() * $pagination->pageSize + 1;
$end = $begin + $count - 1;
if ($end > $totalCount) {
$end = $totalCount;
$begin = $end - $count + 1;
}
$page = $pagination->getPage() + 1;
$pageCount = $pagination->pageCount;
if (($summaryContent = $this->summary) === null) {
$summaryContent = '' . Yii::t('yii', 'Total 1 result.|Showing {begin}-{end} of {totalCount} results.', $totalCount) . '
';
}
} else {
$begin = $page = $pageCount = 1;
$end = $totalCount = $count;
if (($summaryContent = $this->summary) === null) {
$summaryContent = '' . Yii::t('yii', 'Total 1 result.|Total {count} results.', $count) . '
';
}
}
return strtr($summaryContent, array(
'{begin}' => $begin,
'{end}' => $end,
'{count}' => $count,
'{totalCount}' => $totalCount,
'{page}' => $page,
'{pageCount}' => $pageCount,
));
}
/**
* Renders all data items.
* @return string the rendering result
*/
public function renderItems()
{
$items = $this->dataProvider->getItems();
$keys = $this->dataProvider->getKeys();
$rows = array();
foreach (array_values($items) as $index => $item) {
$rows[] = $this->renderItem($item, $keys[$index], $index);
}
return implode($this->separator, $rows);
}
/**
* Renders a single data item.
* @param mixed $item the data item to be rendered
* @param mixed $key the key value associated with the data item
* @param integer $index the zero-based index of the data item in the item array returned by [[dataProvider]].
* @return string the rendering result
*/
public function renderItem($item, $key, $index)
{
if ($this->itemView === null) {
$content = $key;
} elseif (is_string($this->itemView)) {
$content = $this->getView()->render($this->itemView, array(
'item' => $item,
'key' => $key,
'index' => $index,
'widget' => $this,
));
} else {
$content = call_user_func($this->itemView, $item, $key, $index, $this);
}
$options = $this->itemOptions;
$tag = ArrayHelper::remove($options, 'tag', 'div');
if ($tag !== false) {
$options['data-key'] = $key;
return Html::tag($tag, $content, $options);
} else {
return $content;
}
}
/**
* Renders the sorter.
* @return string the rendering result
*/
public function renderSorter()
{
$sort = $this->dataProvider->getSort();
if ($sort === false || empty($sort->attributes) || $this->dataProvider->getCount() <= 0) {
return '';
}
/** @var LinkSorter $class */
$class = ArrayHelper::remove($this->sorter, 'class', LinkSorter::className());
$this->sorter['sort'] = $sort;
return $class::widget($this->sorter);
}
/**
* Renders the pager.
* @return string the rendering result
*/
public function renderPager()
{
$pagination = $this->dataProvider->getPagination();
if ($pagination === false || $this->dataProvider->getCount() <= 0) {
return '';
}
/** @var LinkPager $class */
$class = ArrayHelper::remove($this->sorter, 'class', LinkPager::className());
$this->pager['pagination'] = $pagination;
return $class::widget($this->pager);
}
}