www.gusucode.com > KPPW众包威客PHP开源建站系统 v3.0源码程序 > KPPW/vendor/laravel/framework/src/Illuminate/Pagination/AbstractPaginator.php
<?php
namespace Illuminate\Pagination;
use Closure;
use ArrayIterator;
abstract class AbstractPaginator
{
/**
* All of the items being paginated.
*
* @var \Illuminate\Support\Collection
*/
protected $items;
/**
* The number of items to be shown per page.
*
* @var int
*/
protected $perPage;
/**
* The current page being "viewed".
*
* @var int
*/
protected $currentPage;
/**
* The base path to assign to all URLs.
*
* @var string
*/
protected $path = '/';
/**
* The query parameters to add to all URLs.
*
* @var array
*/
protected $query = [];
/**
* The URL fragment to add to all URLs.
*
* @var string|null
*/
protected $fragment = null;
/**
* The query string variable used to store the page.
*
* @var string
*/
protected $pageName = 'page';
/**
* The current page resolver callback.
*
* @var \Closure
*/
protected static $currentPathResolver;
/**
* The current page resolver callback.
*
* @var \Closure
*/
protected static $currentPageResolver;
/**
* The default presenter resolver.
*
* @var \Closure
*/
protected static $presenterResolver;
/**
* Determine if the given value is a valid page number.
*
* @param int $page
* @return bool
*/
protected function isValidPageNumber($page)
{
return $page >= 1 && filter_var($page, FILTER_VALIDATE_INT) !== false;
}
/**
* Create a range of pagination URLs.
*
* @param int $start
* @param int $end
* @return string
*/
public function getUrlRange($start, $end)
{
$urls = [];
for ($page = $start; $page <= $end; $page++) {
$urls[$page] = $this->url($page);
}
return $urls;
}
/**
* Get a URL for a given page number.
*
* @param int $page
* @return string
*/
public function url($page)
{
if ($page <= 0) {
$page = 1;
}
// If we have any extra query string key / value pairs that need to be added
// onto the URL, we will put them in query string form and then attach it
// to the URL. This allows for extra information like sortings storage.
$parameters = [$this->pageName => $page];
if (count($this->query) > 0) {
$parameters = array_merge($this->query, $parameters);
}
return $this->path.'?'
.urldecode(http_build_query($parameters, null, '&'))
.$this->buildFragment();
}
/**
* Get the URL for the previous page.
*
* @return string|null
*/
public function previousPageUrl()
{
if ($this->currentPage() > 1) {
return $this->url($this->currentPage() - 1);
}
}
/**
* Get / set the URL fragment to be appended to URLs.
*
* @param string|null $fragment
* @return $this|string|null
*/
public function fragment($fragment = null)
{
if (is_null($fragment)) {
return $this->fragment;
}
$this->fragment = $fragment;
return $this;
}
/**
* Add a set of query string values to the paginator.
*
* @param array|string $key
* @param string|null $value
* @return $this
*/
public function appends($key, $value = null)
{
if (is_array($key)) {
return $this->appendArray($key);
}
return $this->addQuery($key, $value);
}
/**
* Add an array of query string values.
*
* @param array $keys
* @return $this
*/
protected function appendArray(array $keys)
{
foreach ($keys as $key => $value) {
$this->addQuery($key, $value);
}
return $this;
}
/**
* Add a query string value to the paginator.
*
* @param string $key
* @param string $value
* @return $this
*/
public function addQuery($key, $value)
{
if ($key !== $this->pageName) {
$this->query[$key] = $value;
}
return $this;
}
/**
* Build the full fragment portion of a URL.
*
* @return string
*/
protected function buildFragment()
{
return $this->fragment ? '#'.$this->fragment : '';
}
/**
* Get the slice of items being paginated.
*
* @return array
*/
public function items()
{
return $this->items->all();
}
/**
* Get the number of the first item in the slice.
*
* @return int
*/
public function firstItem()
{
return ($this->currentPage - 1) * $this->perPage + 1;
}
/**
* Get the number of the last item in the slice.
*
* @return int
*/
public function lastItem()
{
return $this->firstItem() + $this->count() - 1;
}
/**
* Get the number of items shown per page.
*
* @return int
*/
public function perPage()
{
return $this->perPage;
}
/**
* Get the current page.
*
* @return int
*/
public function currentPage()
{
return $this->currentPage;
}
/**
* Determine if there are enough items to split into multiple pages.
*
* @return bool
*/
public function hasPages()
{
return ! ($this->currentPage() == 1 && ! $this->hasMorePages());
}
/**
* Resolve the current request path or return the default value.
*
* @param string $default
* @return string
*/
public static function resolveCurrentPath($default = '/')
{
if (isset(static::$currentPathResolver)) {
return call_user_func(static::$currentPathResolver);
}
return $default;
}
/**
* Set the current request path resolver callback.
*
* @param \Closure $resolver
* @return void
*/
public static function currentPathResolver(Closure $resolver)
{
static::$currentPathResolver = $resolver;
}
/**
* Resolve the current page or return the default value.
*
* @param string $pageName
* @param int $default
* @return int
*/
public static function resolveCurrentPage($pageName = 'page', $default = 1)
{
if (isset(static::$currentPageResolver)) {
return call_user_func(static::$currentPageResolver, $pageName);
}
return $default;
}
/**
* Set the current page resolver callback.
*
* @param \Closure $resolver
* @return void
*/
public static function currentPageResolver(Closure $resolver)
{
static::$currentPageResolver = $resolver;
}
/**
* Set the default Presenter resolver.
*
* @param \Closure $resolver
* @return void
*/
public static function presenter(Closure $resolver)
{
static::$presenterResolver = $resolver;
}
/**
* Get the query string variable used to store the page.
*
* @return string
*/
public function getPageName()
{
return $this->pageName;
}
/**
* Set the query string variable used to store the page.
*
* @param string $name
* @return $this
*/
public function setPageName($name)
{
$this->pageName = $name;
return $this;
}
/**
* Set the base path to assign to all URLs.
*
* @param string $path
* @return $this
*/
public function setPath($path)
{
$this->path = $path;
return $this;
}
/**
* Get an iterator for the items.
*
* @return \ArrayIterator
*/
public function getIterator()
{
return new ArrayIterator($this->items->all());
}
/**
* Determine if the list of items is empty or not.
*
* @return bool
*/
public function isEmpty()
{
return $this->items->isEmpty();
}
/**
* Get the number of items for the current page.
*
* @return int
*/
public function count()
{
return $this->items->count();
}
/**
* Get the paginator's underlying collection.
*
* @return \Illuminate\Support\Collection
*/
public function getCollection()
{
return $this->items;
}
/**
* Determine if the given item exists.
*
* @param mixed $key
* @return bool
*/
public function offsetExists($key)
{
return $this->items->has($key);
}
/**
* Get the item at the given offset.
*
* @param mixed $key
* @return mixed
*/
public function offsetGet($key)
{
return $this->items->get($key);
}
/**
* Set the item at the given offset.
*
* @param mixed $key
* @param mixed $value
* @return void
*/
public function offsetSet($key, $value)
{
$this->items->put($key, $value);
}
/**
* Unset the item at the given key.
*
* @param mixed $key
* @return void
*/
public function offsetUnset($key)
{
$this->items->forget($key);
}
/**
* Make dynamic calls into the collection.
*
* @param string $method
* @param array $parameters
* @return mixed
*/
public function __call($method, $parameters)
{
return call_user_func_array([$this->getCollection(), $method], $parameters);
}
/**
* Render the contents of the paginator when casting to string.
*
* @return string
*/
public function __toString()
{
return $this->render();
}
}