* @since 2.0
*/
abstract class ListViewBase 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 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|boolean the HTML content to be displayed when [[dataProvider]] does not have any data.
* If false, the list view will still be displayed (without body content though).
*/
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 $layout = "{summary}\n{sorter}\n{items}\n{pager}";
/**
* Renders the data models.
* @return string the rendering result.
*/
abstract public function renderItems();
/**
* Initializes the view.
*/
public function init()
{
if ($this->dataProvider === null) {
throw new InvalidConfigException('The "dataProvider" property must be set.');
}
}
/**
* Runs the widget.
*/
public function run()
{
if ($this->dataProvider->getCount() > 0 || $this->empty === false) {
$widget = $this;
$content = preg_replace_callback("/{\\w+}/", function ($matches) use ($widget) {
$content = $widget->renderSection($matches[0]);
return $content === false ? $matches[0] : $content;
}, $this->layout);
} else {
$content = '' . ($this->empty === null ? Yii::t('yii', 'No results found.') : $this->empty) . '
';
}
$tag = ArrayHelper::remove($this->options, 'tag', 'div');
echo Html::tag($tag, $content, $this->options);
}
/**
* Renders a section of the specified name.
* If the named section is not supported, false will be returned.
* @param string $name the section name, e.g., `{summary}`, `{items}`.
* @return string|boolean the rendering result of the section, or false if the named section is not supported.
*/
public function renderSection($name)
{
switch ($name) {
case '{summary}':
return $this->renderSummary();
case '{items}':
return $this->renderItems();
case '{pager}':
return $this->renderPager();
case '{sorter}':
return $this->renderSorter();
default:
return false;
}
}
/**
* 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 item.|Showing {begin}-{end} of {totalCount} items.', $totalCount) . '
';
}
} else {
$begin = $page = $pageCount = 1;
$end = $totalCount = $count;
if (($summaryContent = $this->summary) === null) {
$summaryContent = '' . Yii::t('yii', 'Total 1 item.|Total {count} items.', $count) . '
';
}
}
return strtr($summaryContent, array(
'{begin}' => $begin,
'{end}' => $end,
'{count}' => $count,
'{totalCount}' => $totalCount,
'{page}' => $page,
'{pageCount}' => $pageCount,
));
}
/**
* 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->pager, 'class', LinkPager::className());
$this->pager['pagination'] = $pagination;
return $class::widget($this->pager);
}
/**
* 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);
}
}