www.gusucode.com > tpframe PHP开发框架 v2.2PHP源码程序 > tpframe PHP开发框架 v2.2/tpframe_v2.2.0618/tpframe_v2.2.0618/coreframe/thinkphp/library/think/Paginator.php
<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: zhangyajun <448901948@qq.com>
// +----------------------------------------------------------------------
namespace think;
use ArrayAccess;
use ArrayIterator;
use Countable;
use IteratorAggregate;
use JsonSerializable;
use Traversable;
abstract class Paginator implements ArrayAccess, Countable, IteratorAggregate, JsonSerializable
{
/** @var bool 是否为简洁模式 */
protected $simple = false;
/** @var Collection 数据集 */
protected $items;
/** @var integer 当前页 */
protected $currentPage;
/** @var integer 最后一页 */
protected $lastPage;
/** @var integer|null 数据总数 */
protected $total;
/** @var integer 每页的数量 */
protected $listRows;
/** @var bool 是否有下一页 */
protected $hasMore;
/** @var array 一些配置 */
protected $options = [
'var_page' => 'page',
'path' => '/',
'query' => [],
'fragment' => '',
];
/** @var mixed simple模式下的下个元素 */
protected $nextItem;
public function __construct($items, $listRows, $currentPage = null, $total = null, $simple = false, $options = [])
{
$this->options = array_merge($this->options, $options);
$this->options['path'] = '/' != $this->options['path'] ? rtrim($this->options['path'], '/') : $this->options['path'];
$this->simple = $simple;
$this->listRows = $listRows;
if (!$items instanceof Collection) {
$items = Collection::make($items);
}
if ($simple) {
$this->currentPage = $this->setCurrentPage($currentPage);
$this->hasMore = count($items) > ($this->listRows);
if ($this->hasMore) {
$this->nextItem = $items->slice($this->listRows, 1);
}
$items = $items->slice(0, $this->listRows);
} else {
$this->total = $total;
$this->lastPage = (int) ceil($total / $listRows);
$this->currentPage = $this->setCurrentPage($currentPage);
$this->hasMore = $this->currentPage < $this->lastPage;
}
$this->items = $items;
}
/**
* @param $items
* @param $listRows
* @param null $currentPage
* @param bool $simple
* @param null $total
* @param array $options
* @return Paginator
*/
public static function make($items, $listRows, $currentPage = null, $total = null, $simple = false, $options = [])
{
return new static($items, $listRows, $currentPage, $total, $simple, $options);
}
protected function setCurrentPage($currentPage)
{
if (!$this->simple && $currentPage > $this->lastPage) {
return $this->lastPage > 0 ? $this->lastPage : 1;
}
return $currentPage;
}
/**
* 获取页码对应的链接
*
* @param $page
* @return string
*/
protected function url($page)
{
if ($page <= 0) {
$page = 1;
}
if (strpos($this->options['path'], '[PAGE]') === false) {
$parameters = [$this->options['var_page'] => $page];
$path = $this->options['path'];
} else {
$parameters = [];
$path = str_replace('[PAGE]', $page, $this->options['path']);
}
if (count($this->options['query']) > 0) {
$parameters = array_merge($this->options['query'], $parameters);
}
$url = $path;
if (!empty($parameters)) {
$url .= '?' . http_build_query($parameters, null, '&');
}
return $url . $this->buildFragment();
}
/**
* 自动获取当前页码
* @param string $varPage
* @param int $default
* @return int
*/
public static function getCurrentPage($varPage = 'page', $default = 1)
{
$page = (int) Request::instance()->param($varPage);
if (filter_var($page, FILTER_VALIDATE_INT) !== false && $page >= 1) {
return $page;
}
return $default;
}
/**
* 自动获取当前的path
* @return string
*/
public static function getCurrentPath()
{
return Request::instance()->baseUrl();
}
public function total()
{
if ($this->simple) {
throw new \DomainException('not support total');
}
return $this->total;
}
public function listRows()
{
return $this->listRows;
}
public function currentPage()
{
return $this->currentPage;
}
public function lastPage()
{
if ($this->simple) {
throw new \DomainException('not support last');
}
return $this->lastPage;
}
/**
* 数据是否足够分页
* @return boolean
*/
public function hasPages()
{
return !(1 == $this->currentPage && !$this->hasMore);
}
/**
* 创建一组分页链接
*
* @param int $start
* @param int $end
* @return array
*/
public function getUrlRange($start, $end)
{
$urls = [];
for ($page = $start; $page <= $end; $page++) {
$urls[$page] = $this->url($page);
}
return $urls;
}
/**
* 设置URL锚点
*
* @param string|null $fragment
* @return $this
*/
public function fragment($fragment)
{
$this->options['fragment'] = $fragment;
return $this;
}
/**
* 添加URL参数
*
* @param array|string $key
* @param string|null $value
* @return $this
*/
public function appends($key, $value = null)
{
if (!is_array($key)) {
$queries = [$key => $value];
} else {
$queries = $key;
}
foreach ($queries as $k => $v) {
if ($k !== $this->options['var_page']) {
$this->options['query'][$k] = $v;
}
}
return $this;
}
/**
* 构造锚点字符串
*
* @return string
*/
protected function buildFragment()
{
return $this->options['fragment'] ? '#' . $this->options['fragment'] : '';
}
/**
* 渲染分页html
* @return mixed
*/
abstract public function render();
public function items()
{
return $this->items->all();
}
public function getCollection()
{
return $this->items;
}
public function isEmpty()
{
return $this->items->isEmpty();
}
/**
* 给每个元素执行个回调
*
* @param callable $callback
* @return $this
*/
public function each(callable $callback)
{
foreach ($this->items as $key => $item) {
$result = $callback($item, $key);
if (false === $result) {
break;
} elseif (!is_object($item)) {
$this->items[$key] = $result;
}
}
return $this;
}
/**
* Retrieve an external iterator
* @return Traversable An instance of an object implementing <b>Iterator</b> or
* <b>Traversable</b>
*/
public function getIterator()
{
return new ArrayIterator($this->items->all());
}
/**
* Whether a offset exists
* @param mixed $offset
* @return bool
*/
public function offsetExists($offset)
{
return $this->items->offsetExists($offset);
}
/**
* Offset to retrieve
* @param mixed $offset
* @return mixed
*/
public function offsetGet($offset)
{
return $this->items->offsetGet($offset);
}
/**
* Offset to set
* @param mixed $offset
* @param mixed $value
*/
public function offsetSet($offset, $value)
{
$this->items->offsetSet($offset, $value);
}
/**
* Offset to unset
* @param mixed $offset
* @return void
* @since 5.0.0
*/
public function offsetUnset($offset)
{
$this->items->offsetUnset($offset);
}
/**
* Count elements of an object
*/
public function count()
{
return $this->items->count();
}
public function __toString()
{
return (string) $this->render();
}
public function toArray()
{
if ($this->simple) {
return [
'per_page' => $this->listRows,
'current_page' => $this->currentPage,
'has_more' => $this->hasMore,
'next_item' => $this->nextItem,
'data' => $this->items->toArray(),
];
} else {
return [
'total' => $this->total,
'per_page' => $this->listRows,
'current_page' => $this->currentPage,
'last_page' => $this->lastPage,
'data' => $this->items->toArray(),
];
}
}
/**
* Specify data which should be serialized to JSON
*/
public function jsonSerialize()
{
return $this->toArray();
}
public function __call($name, $arguments)
{
$collection = $this->getCollection();
$result = call_user_func_array([$collection, $name], $arguments);
if ($result === $collection) {
return $this;
}
return $result;
}
}