// +----------------------------------------------------------------------
namespace dxtc;
use think\Paginator;
use think\Collection;
/**
* Bootstrap 分页驱动
*/
class Bootstrap extends Paginator
{
public function __construct($items, int $listRows, int $currentPage = 1, int $total = null, bool $simple = false, array $options = [])
{
$this->options = array_merge($this->options, $options);
$this->options['path'] = '/' != $this->options['path'] ? $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);
$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;
}
/**
* 上一页按钮
* @param string $text
* $text = ''
* @return string
*/
protected function getPreviousButton(string $text = ''): string
{
if ($this->currentPage() <= 1) {
//return $this->getDisabledTextWrapper($text);
return '';
}
$url = $this->url(
$this->currentPage() - 1
);
return $this->getPageLinkWrapper($url, $text);
}
/**
* 下一页按钮
* @param string $text
* $text = ''
* @return string
*/
protected function getNextButton(string $text=''): string
{
if (!$this->hasMore) {
// return $this->getDisabledTextWrapper($text);
return '';
}
$url = $this->url($this->currentPage() + 1);
return $this->getPageLinkWrapper($url, $text);
}
/**
* 页码按钮
* @return string
*/
protected function getLinks(): string
{
if ($this->simple) {
return '';
}
$block = [
'first' => null,
'slider' => null,
'last' => null,
];
$side= 3;
$window = $side * 2;
if ($this->lastPage < $window + 6) {
$block['first'] = $this->getUrlRange(1, $this->lastPage);
} elseif ($this->currentPage <= $window) {
$block['first'] = $this->getUrlRange(1, $window + 2);
$block['last'] = $this->getUrlRange($this->lastPage - 1, $this->lastPage);
} elseif ($this->currentPage > ($this->lastPage - $window)) {
$block['first'] = $this->getUrlRange(1, 2);
$block['last'] = $this->getUrlRange($this->lastPage - ($window + 2), $this->lastPage);
} else {
$block['first'] = $this->getUrlRange(1, 2);
$block['slider'] = $this->getUrlRange($this->currentPage - $side, $this->currentPage + $side);
$block['last'] = $this->getUrlRange($this->lastPage - 1, $this->lastPage);
}
$html = '';
if (is_array($block['first'])) {
$html .= $this->getUrlLinks($block['first']);
}
if (is_array($block['slider'])) {
$html .= $this->getDots();
$html .= $this->getUrlLinks($block['slider']);
}
if (is_array($block['last'])) {
$html .= $this->getDots();
$html .= $this->getUrlLinks($block['last']);
}
return $html;
}
/**
* 渲染分页html
* @return mixed
*/
public function render()
{
if ($this->hasPages()) {
if ($this->simple) {
return sprintf(
'',
$this->getPreviousButton(),
$this->getNextButton()
);
} else {
return sprintf(
'',
$this->getPreviousButton(),
$this->getLinks(),
$this->getNextButton()
);
}
}
}
/**
* 生成一个可点击的按钮
*
* @param string $url
* @param string $page
* @return string
*/
protected function getAvailablePageWrapper(string $url, string $page): string
{
return '' . $page . '';
}
/**
* 生成一个禁用的按钮
*
* @param string $text
* @return string
*/
protected function getDisabledTextWrapper(string $text): string
{
return '' . $text . '';
}
/**
* 生成一个激活的按钮
*
* @param string $text
* @return string
*/
protected function getActivePageWrapper(string $text): string
{
return '' . $text . '';
}
/**
* 生成省略号按钮
*
* @return string
*/
protected function getDots(): string
{
return $this->getDisabledTextWrapper('...');
}
/**
* 批量生成页码按钮.
*
* @param array $urls
* @return string
*/
protected function getUrlLinks(array $urls): string
{
$html = '';
foreach ($urls as $page => $url) {
$html .= $this->getPageLinkWrapper($url, $page);
}
return $html;
}
/**
* 生成普通页码按钮
*
* @param string $url
* @param string $page
* @return string
*/
protected function getPageLinkWrapper(string $url, string $page): string
{
if ($this->currentPage() == $page) {
return $this->getActivePageWrapper($page);
}
return $this->getAvailablePageWrapper($url, $page);
}
/**
* 获取页码对应的链接
*
* @access protected
* @param int $page
* @return string
*/
protected function url(int $page): string
{
if ($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, '', '&');
}
return $url . $this->buildFragment();
}
}