354 lines
13 KiB
PHP
354 lines
13 KiB
PHP
<?php
|
|
/**
|
|
* @link http://www.yiiframework.com/
|
|
* @copyright Copyright (c) 2008 Yii Software LLC
|
|
* @license http://www.yiiframework.com/license/
|
|
*/
|
|
|
|
namespace yii\data;
|
|
|
|
use Yii;
|
|
use yii\base\BaseObject;
|
|
use yii\web\Link;
|
|
use yii\web\Linkable;
|
|
use yii\web\Request;
|
|
|
|
/**
|
|
* Pagination represents information relevant to pagination of data items.
|
|
*
|
|
* When data needs to be rendered in multiple pages, Pagination can be used to
|
|
* represent information such as [[totalCount|total item count]], [[pageSize|page size]],
|
|
* [[page|current page]], etc. These information can be passed to [[\yii\widgets\LinkPager|pagers]]
|
|
* to render pagination buttons or links.
|
|
*
|
|
* The following example shows how to create a pagination object and feed it
|
|
* to a pager.
|
|
*
|
|
* Controller action:
|
|
*
|
|
* ```php
|
|
* public function actionIndex()
|
|
* {
|
|
* $query = Article::find()->where(['status' => 1]);
|
|
* $countQuery = clone $query;
|
|
* $pages = new Pagination(['totalCount' => $countQuery->count()]);
|
|
* $models = $query->offset($pages->offset)
|
|
* ->limit($pages->limit)
|
|
* ->all();
|
|
*
|
|
* return $this->render('index', [
|
|
* 'models' => $models,
|
|
* 'pages' => $pages,
|
|
* ]);
|
|
* }
|
|
* ```
|
|
*
|
|
* View:
|
|
*
|
|
* ```php
|
|
* foreach ($models as $model) {
|
|
* // display $model here
|
|
* }
|
|
*
|
|
* // display pagination
|
|
* echo LinkPager::widget([
|
|
* 'pagination' => $pages,
|
|
* ]);
|
|
* ```
|
|
*
|
|
* For more details and usage information on Pagination, see the [guide article on pagination](guide:output-pagination).
|
|
*
|
|
* @property int $limit The limit of the data. This may be used to set the LIMIT value for a SQL statement for
|
|
* fetching the current page of data. Note that if the page size is infinite, a value -1 will be returned. This
|
|
* property is read-only.
|
|
* @property array $links The links for navigational purpose. The array keys specify the purpose of the links
|
|
* (e.g. [[LINK_FIRST]]), and the array values are the corresponding URLs. This property is read-only.
|
|
* @property int $offset The offset of the data. This may be used to set the OFFSET value for a SQL statement
|
|
* for fetching the current page of data. This property is read-only.
|
|
* @property int $page The zero-based current page number.
|
|
* @property int $pageCount Number of pages. This property is read-only.
|
|
* @property int $pageSize The number of items per page. If it is less than 1, it means the page size is
|
|
* infinite, and thus a single page contains all items.
|
|
*
|
|
* @author Qiang Xue <qiang.xue@gmail.com>
|
|
* @since 2.0
|
|
*/
|
|
class Pagination extends BaseObject implements Linkable
|
|
{
|
|
const LINK_NEXT = 'next';
|
|
const LINK_PREV = 'prev';
|
|
const LINK_FIRST = 'first';
|
|
const LINK_LAST = 'last';
|
|
|
|
/**
|
|
* @var string name of the parameter storing the current page index.
|
|
* @see params
|
|
*/
|
|
public $pageParam = 'page';
|
|
/**
|
|
* @var string name of the parameter storing the page size.
|
|
* @see params
|
|
*/
|
|
public $pageSizeParam = 'per-page';
|
|
/**
|
|
* @var bool whether to always have the page parameter in the URL created by [[createUrl()]].
|
|
* If false and [[page]] is 0, the page parameter will not be put in the URL.
|
|
*/
|
|
public $forcePageParam = true;
|
|
/**
|
|
* @var string the route of the controller action for displaying the paged contents.
|
|
* If not set, it means using the currently requested route.
|
|
*/
|
|
public $route;
|
|
/**
|
|
* @var array parameters (name => value) that should be used to obtain the current page number
|
|
* and to create new pagination URLs. If not set, all parameters from $_GET will be used instead.
|
|
*
|
|
* In order to add hash to all links use `array_merge($_GET, ['#' => 'my-hash'])`.
|
|
*
|
|
* The array element indexed by [[pageParam]] is considered to be the current page number (defaults to 0);
|
|
* while the element indexed by [[pageSizeParam]] is treated as the page size (defaults to [[defaultPageSize]]).
|
|
*/
|
|
public $params;
|
|
/**
|
|
* @var \yii\web\UrlManager the URL manager used for creating pagination URLs. If not set,
|
|
* the "urlManager" application component will be used.
|
|
*/
|
|
public $urlManager;
|
|
/**
|
|
* @var bool whether to check if [[page]] is within valid range.
|
|
* When this property is true, the value of [[page]] will always be between 0 and ([[pageCount]]-1).
|
|
* Because [[pageCount]] relies on the correct value of [[totalCount]] which may not be available
|
|
* in some cases (e.g. MongoDB), you may want to set this property to be false to disable the page
|
|
* number validation. By doing so, [[page]] will return the value indexed by [[pageParam]] in [[params]].
|
|
*/
|
|
public $validatePage = true;
|
|
/**
|
|
* @var int total number of items.
|
|
*/
|
|
public $totalCount = 0;
|
|
/**
|
|
* @var int the default page size. This property will be returned by [[pageSize]] when page size
|
|
* cannot be determined by [[pageSizeParam]] from [[params]].
|
|
*/
|
|
public $defaultPageSize = 20;
|
|
/**
|
|
* @var array|false the page size limits. The first array element stands for the minimal page size, and the second
|
|
* the maximal page size. If this is false, it means [[pageSize]] should always return the value of [[defaultPageSize]].
|
|
*/
|
|
public $pageSizeLimit = [1, 50];
|
|
|
|
/**
|
|
* @var int number of items on each page.
|
|
* If it is less than 1, it means the page size is infinite, and thus a single page contains all items.
|
|
*/
|
|
private $_pageSize;
|
|
|
|
|
|
/**
|
|
* @return int number of pages
|
|
*/
|
|
public function getPageCount()
|
|
{
|
|
$pageSize = $this->getPageSize();
|
|
if ($pageSize < 1) {
|
|
return $this->totalCount > 0 ? 1 : 0;
|
|
}
|
|
|
|
$totalCount = $this->totalCount < 0 ? 0 : (int) $this->totalCount;
|
|
|
|
return (int) (($totalCount + $pageSize - 1) / $pageSize);
|
|
}
|
|
|
|
private $_page;
|
|
|
|
/**
|
|
* Returns the zero-based current page number.
|
|
* @param bool $recalculate whether to recalculate the current page based on the page size and item count.
|
|
* @return int the zero-based current page number.
|
|
*/
|
|
public function getPage($recalculate = false)
|
|
{
|
|
if ($this->_page === null || $recalculate) {
|
|
$page = (int) $this->getQueryParam($this->pageParam, 1) - 1;
|
|
$this->setPage($page, true);
|
|
}
|
|
|
|
return $this->_page;
|
|
}
|
|
|
|
/**
|
|
* Sets the current page number.
|
|
* @param int $value the zero-based index of the current page.
|
|
* @param bool $validatePage whether to validate the page number. Note that in order
|
|
* to validate the page number, both [[validatePage]] and this parameter must be true.
|
|
*/
|
|
public function setPage($value, $validatePage = false)
|
|
{
|
|
if ($value === null) {
|
|
$this->_page = null;
|
|
} else {
|
|
$value = (int) $value;
|
|
if ($validatePage && $this->validatePage) {
|
|
$pageCount = $this->getPageCount();
|
|
if ($value >= $pageCount) {
|
|
$value = $pageCount - 1;
|
|
}
|
|
}
|
|
if ($value < 0) {
|
|
$value = 0;
|
|
}
|
|
$this->_page = $value;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the number of items per page.
|
|
* By default, this method will try to determine the page size by [[pageSizeParam]] in [[params]].
|
|
* If the page size cannot be determined this way, [[defaultPageSize]] will be returned.
|
|
* @return int the number of items per page. If it is less than 1, it means the page size is infinite,
|
|
* and thus a single page contains all items.
|
|
* @see pageSizeLimit
|
|
*/
|
|
public function getPageSize()
|
|
{
|
|
if ($this->_pageSize === null) {
|
|
if (empty($this->pageSizeLimit) || !isset($this->pageSizeLimit[0], $this->pageSizeLimit[1])) {
|
|
$pageSize = $this->defaultPageSize;
|
|
$this->setPageSize($pageSize);
|
|
} else {
|
|
$pageSize = (int) $this->getQueryParam($this->pageSizeParam, $this->defaultPageSize);
|
|
$this->setPageSize($pageSize, true);
|
|
}
|
|
}
|
|
|
|
return $this->_pageSize;
|
|
}
|
|
|
|
/**
|
|
* @param int $value the number of items per page.
|
|
* @param bool $validatePageSize whether to validate page size.
|
|
*/
|
|
public function setPageSize($value, $validatePageSize = false)
|
|
{
|
|
if ($value === null) {
|
|
$this->_pageSize = null;
|
|
} else {
|
|
$value = (int) $value;
|
|
if ($validatePageSize && isset($this->pageSizeLimit[0], $this->pageSizeLimit[1])) {
|
|
if ($value < $this->pageSizeLimit[0]) {
|
|
$value = $this->pageSizeLimit[0];
|
|
} elseif ($value > $this->pageSizeLimit[1]) {
|
|
$value = $this->pageSizeLimit[1];
|
|
}
|
|
}
|
|
$this->_pageSize = $value;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates the URL suitable for pagination with the specified page number.
|
|
* This method is mainly called by pagers when creating URLs used to perform pagination.
|
|
* @param int $page the zero-based page number that the URL should point to.
|
|
* @param int $pageSize the number of items on each page. If not set, the value of [[pageSize]] will be used.
|
|
* @param bool $absolute whether to create an absolute URL. Defaults to `false`.
|
|
* @return string the created URL
|
|
* @see params
|
|
* @see forcePageParam
|
|
*/
|
|
public function createUrl($page, $pageSize = null, $absolute = false)
|
|
{
|
|
$page = (int) $page;
|
|
$pageSize = (int) $pageSize;
|
|
if (($params = $this->params) === null) {
|
|
$request = Yii::$app->getRequest();
|
|
$params = $request instanceof Request ? $request->getQueryParams() : [];
|
|
}
|
|
if ($page > 0 || $page == 0 && $this->forcePageParam) {
|
|
$params[$this->pageParam] = $page + 1;
|
|
} else {
|
|
unset($params[$this->pageParam]);
|
|
}
|
|
if ($pageSize <= 0) {
|
|
$pageSize = $this->getPageSize();
|
|
}
|
|
if ($pageSize != $this->defaultPageSize) {
|
|
$params[$this->pageSizeParam] = $pageSize;
|
|
} else {
|
|
unset($params[$this->pageSizeParam]);
|
|
}
|
|
$params[0] = $this->route === null ? Yii::$app->controller->getRoute() : $this->route;
|
|
$urlManager = $this->urlManager === null ? Yii::$app->getUrlManager() : $this->urlManager;
|
|
if ($absolute) {
|
|
return $urlManager->createAbsoluteUrl($params);
|
|
}
|
|
|
|
return $urlManager->createUrl($params);
|
|
}
|
|
|
|
/**
|
|
* @return int the offset of the data. This may be used to set the
|
|
* OFFSET value for a SQL statement for fetching the current page of data.
|
|
*/
|
|
public function getOffset()
|
|
{
|
|
$pageSize = $this->getPageSize();
|
|
|
|
return $pageSize < 1 ? 0 : $this->getPage() * $pageSize;
|
|
}
|
|
|
|
/**
|
|
* @return int the limit of the data. This may be used to set the
|
|
* LIMIT value for a SQL statement for fetching the current page of data.
|
|
* Note that if the page size is infinite, a value -1 will be returned.
|
|
*/
|
|
public function getLimit()
|
|
{
|
|
$pageSize = $this->getPageSize();
|
|
|
|
return $pageSize < 1 ? -1 : $pageSize;
|
|
}
|
|
|
|
/**
|
|
* Returns a whole set of links for navigating to the first, last, next and previous pages.
|
|
* @param bool $absolute whether the generated URLs should be absolute.
|
|
* @return array the links for navigational purpose. The array keys specify the purpose of the links (e.g. [[LINK_FIRST]]),
|
|
* and the array values are the corresponding URLs.
|
|
*/
|
|
public function getLinks($absolute = false)
|
|
{
|
|
$currentPage = $this->getPage();
|
|
$pageCount = $this->getPageCount();
|
|
$links = [
|
|
Link::REL_SELF => $this->createUrl($currentPage, null, $absolute),
|
|
];
|
|
if ($currentPage > 0) {
|
|
$links[self::LINK_FIRST] = $this->createUrl(0, null, $absolute);
|
|
$links[self::LINK_PREV] = $this->createUrl($currentPage - 1, null, $absolute);
|
|
}
|
|
if ($currentPage < $pageCount - 1) {
|
|
$links[self::LINK_NEXT] = $this->createUrl($currentPage + 1, null, $absolute);
|
|
$links[self::LINK_LAST] = $this->createUrl($pageCount - 1, null, $absolute);
|
|
}
|
|
|
|
return $links;
|
|
}
|
|
|
|
/**
|
|
* Returns the value of the specified query parameter.
|
|
* This method returns the named parameter value from [[params]]. Null is returned if the value does not exist.
|
|
* @param string $name the parameter name
|
|
* @param string $defaultValue the value to be returned when the specified parameter does not exist in [[params]].
|
|
* @return string the parameter value
|
|
*/
|
|
protected function getQueryParam($name, $defaultValue = null)
|
|
{
|
|
if (($params = $this->params) === null) {
|
|
$request = Yii::$app->getRequest();
|
|
$params = $request instanceof Request ? $request->getQueryParams() : [];
|
|
}
|
|
|
|
return isset($params[$name]) && is_scalar($params[$name]) ? $params[$name] : $defaultValue;
|
|
}
|
|
}
|