PHP¿ò¼ÜLaravel²å¼þPaginationʵÏÖ×Ô¶¨Òå·ÖÒ³

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Illuminate/Pagination/LengthAwarePaginator.php

    <?php

    namespace Illuminate\Pagination;

    ......

    class LengthAwarePaginator extends AbstractPaginator implements Arrayable, ArrayAccess, Countable, IteratorAggregate, JsonSerializable, Jsonable, LengthAwarePaginatorContract 
    {
    ......
      public function render(Presenter $presenter = null)
      {
        if (is_null($presenter) && static::$presenterResolver) {
          $presenter = call_user_func(static::$presenterResolver, $this);
        }

        $presenter = $presenter ?: new BootstrapThreePresenter($this);

        return $presenter->render();
      }
    ......
    }

render() Öд«ÈeµÄÊÇÒ»¸o Presenter µÄʵÀý£¬²¢µ÷ÓÃÕa¸oʵÀý»¯µÄ render ½¨À´ÊµÏÖ*ÖÒ³µÄÏÔʾµÄ¡£Èç¹uûÓÐÔoµ÷Óà BootstrapThreePresenter ÖÐ render() µÄ£¬À´¿´¿´ BootstrapThreePresenter ÊǸÉÂiµÄ

Illuminate/Pagination/BootstrapThreePresenter.php

    <?php

    namespace Illuminate\Pagination;

    use Illuminate\Support\HtmlString; 
    use Illuminate\Contracts\Pagination\Paginator as PaginatorContract; 
    use Illuminate\Contracts\Pagination\Presenter as PresenterContract;

    class BootstrapThreePresenter implements PresenterContract 
    {
      use BootstrapThreeNextPreviousButtonRendererTrait, UrlWindowPresenterTrait;

      /**
       * The paginator implementation.
       *
       * @var \Illuminate\Contracts\Pagination\Paginator
       */
      protected $paginator;

      /**
       * The URL window data structure.
       *
       * @var array
       */
      protected $window;

      /**
       * Create a new Bootstrap presenter instance.
       *
       * @param \Illuminate\Contracts\Pagination\Paginator $paginator
       * @param \Illuminate\Pagination\UrlWindow|null $window
       * @return void
       */
      public function __construct(PaginatorContract $paginator, UrlWindow $window = null)
      {
        $this->paginator = $paginator;
        $this->window = is_null($window) ? UrlWindow::make($paginator) : $window->get();
      }

      /**
       * Determine if the underlying paginator being presented has pages to show.
       *
       * @return bool
       */
      public function hasPages()
      {
        return $this->paginator->hasPages();
      }

      /**
       * Convert the URL window into Bootstrap HTML.
       *
       * @return \Illuminate\Support\HtmlString
       */
      public function render()
      {
        if ($this->hasPages()) {
          return new HtmlString(sprintf(
            '<ul class="pagination">%s %s %s</ul>',
            $this->getPreviousButton(),
            $this->getLinks(),
            $this->getNextButton()
          ));
        }

        return '';
      }
    ......
    }

ÕaÀi¿ÉÒÔ¿´µ½ BootstrapThreePresenter ʵÏÖÁË PresenterContract µÄ½Ó¿Ú£¬ render() ²ÅÊÇÖÒ³ÏÔʾµÄÕaeÕýʵÏÖ£¬¹¹Ôi½¨ÖеĵÚÒ»¸o²ÎÊý PaginatorContract Æaʵ¾ÍÊÇÒ»¸o Paginator ÎÒÃǼÌÐø¿´Ï PresenterContract Ò²¾ÍÊÇ Presenter ½Ó¿ÚÖж¨ÒaÁËʲô½*¨ÐeҪʵÏÖ

illuminate/contracts/Pagination/Presenter.php

    <?php

    namespace Illuminate\Contracts\Pagination;

    interface Presenter 
    {
      /**
       * Render the given paginator.
       *
       * @return \Illuminate\Contracts\Support\Htmlable|string
       */
      public function render();

      /**
       * Determine if the underlying paginator being presented has pages to show.
       *
       * @return bool
       */
      public function hasPages();
    }

ÆaÖж¨ÒaÁË render ºÍ hasPages ½¨ÐeҪʵÏÖ

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н¨ÎļþÈçÏ£¨¸oÈËÏ°¹ß£(C)

app/Foundations/Pagination/CustomerPresenter.php

    <?php 
    namespace App\Foundations\Pagination;

    use Illuminate\Contracts\Pagination\Presenter as PresenterContract; 
    use Illuminate\Contracts\Pagination\LengthAwarePaginator as PaginatorContract; 
    use Illuminate\Pagination\UrlWindow; 
    use Illuminate\Support\HtmlString; 
    use Illuminate\Pagination\BootstrapThreeNextPreviousButtonRendererTrait; 
    use Illuminate\Pagination\UrlWindowPresenterTrait;

    class CustomerPresenter implements PresenterContract 
    {
      use BootstrapThreeNextPreviousButtonRendererTrait, UrlWindowPresenterTrait;

      protected $paginator;

      protected $window;

      /**
       * Create a new Bootstrap presenter instance.
       *
       * @param \Illuminate\Contracts\Pagination\Paginator $paginator
       * @param \Illuminate\Pagination\UrlWindow|null $window
       * @return void
       */
      public function __construct(PaginatorContract $paginator, UrlWindow $window = null)
      {
        $this->paginator = $paginator;
        $this->window = is_null($window) ? UrlWindow::make($paginator) : $window->get();
      }

      /**
       * Determine if the underlying paginator being presented has pages to show.
       *
       * @return bool
       */
      public function hasPages()
      {
        return $this->paginator->hasPages();
      }

      /**
       * Convert the URL window into Bootstrap HTML.
       *
       * @return \Illuminate\Support\HtmlString
       */
      public function render()
      {
        if ($this->hasPages()) {
          return new HtmlString(sprintf(
            '<ul class="pagination">%s %s %s</ul>',
            $this->getPreviousButton('ÉÏÒ»Ò³'),//¾ßÌaʵÏÖ¿ÉÒÔ²e¿´¸Ã*½*¨
            $this->getLinks(),
            $this->getNextButton('ÏÂÒ»Ò³')//¾ßÌaʵÏÖ¿ÉÒÔ²e¿´¸Ã*½*¨
          ));
        }

        return '';
      }

      /**
       * Get HTML wrapper for an available page link.
       *
       * @param string $url
       * @param int $page
       * @param string|null $rel
       * @return string
       */
      protected function getAvailablePageWrapper($url, $page, $rel = null)
      {
        $rel = is_null($rel) ? '' : ' rel="' . $rel . '"';

        return '<li><a href="' . htmlentities($url) . '"' . $rel . '>' . $page . '</a></li>';
      }

      /**
       * Get HTML wrapper for disabled text.
       *
       * @param string $text
       * @return string
       */
      protected function getDisabledTextWrapper($text)
      {
        return '<li class="disabled hide"><span>' . $text . '</span></li>';
      }

      /**
       * Get HTML wrapper for active text.
       *
       * @param string $text
       * @return string
       */
      protected function getActivePageWrapper($text)
      {
        return '<li class="active"><span>' . $text . '</span></li>';
      }

      /**
       * Get a pagination "dot" element.
       *
       * @return string
       */
      protected function getDots()
      {
        return $this->getDisabledTextWrapper('...');
      }

      /**
       * Get the current page from the paginator.
       *
       * @return int
       */
      protected function currentPage()
      {
        return $this->paginator->currentPage();
      }

      /**
       * Get the last page from the paginator.
       *
       * @return int
       */
      protected function lastPage()
      {
        return $this->paginator->lastPage();
      }

    }

¾ÍÕaô¼oµ¥£¬Ö÷Òª¾ÍÊÇ render() ½¨£¬Èç¹uÏiÄ¿ÖÐÐeÒªÐÞ¸ÄÖÒ³Ñuʽ£¬»oÕßÌi¼ÓÖÒ³Ìøת֮ÀaµÄÐeÇoÖ»ÒªÖØдÆaÖеĸ÷ÏiÏÔʾµÄ½¨ÖеÄhtmlÔªËؾͿÉÒÔÁË£¬ºÜÁe»i£¬ÔÚbladeÄ£°aÖÐÒ²ÐeÒªÐ޸㬱ÈÈçÎÒÃÇµÄ Paginator ½Ð $users ,ĬÈϵÄ*ÖÒ³ÏÔʾÊÇÕaÑuµÄ£º

{!! $users->render() !!}
Ð޸ijÉÎÒÃÇ×Ô¶¨ÒaºoµÄ*ÖÒ³ÏÔʾ£º

{!! with(new \App\Foundations\Pagination\CustomerPresenter($categories))->render() !!}
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ÄÇôÈç¹uÀ(C)Õ¹simplePaginate?ÆaʵºÜ¼oµ¥£¬Ö»Òª¼Ì³Ð¸Õ²ÅµÄ CustomerPresenter £¬ÊµÏÖ hasPages ºÍ render ,ÖÁÓÚΪʲô¿ÉÒÔ°´ÕÕÎÒÉÏÃae²e¿´Ô´ÂeµÄ*½Ê½¿´Ò»Ï¾ÍÖªµÀÁË£¬±ÈÈçÎÒÃǸijÉ"ÉÏһƪ"ºÍ"ÏÂһƪ"

н¨App\Foundations\Pagination\CustomerSimplePresenter.php

    <?php 
    namespace App\Foundations\Pagination;


    use Illuminate\Support\HtmlString; 
    use Illuminate\Contracts\Pagination\Paginator as PaginatorContract;

    class CustomerSimplePresenter extends CustomerPresenter 
    {
      /**
       * Create a simple Bootstrap 3 presenter.
       *
       * @param \Illuminate\Contracts\Pagination\Paginator $paginator
       * @return void
       */
      public function __construct(PaginatorContract $paginator)
      {
        $this->paginator = $paginator;
      }

      /**
       * Determine if the underlying paginator being presented has pages to show.
       *
       * @return bool
       */
      public function hasPages()
      {
        return $this->paginator->hasPages() && count($this->paginator->items()) > 0;
      }

      /**
       * Convert the URL window into Bootstrap HTML.
       *
       * @return \Illuminate\Support\HtmlString
       */
      public function render()
      {
        if ($this->hasPages()) {
          return new HtmlString(sprintf(
            '<ul class="pager">%s %s</ul>',
            $this->getPreviousButton('ÉÏһƪ'),
            $this->getNextButton('ÏÂһƪ')
          ));
        }

        return '';
      }

    }

*ÖÒ³ÏÔʾ£º

{!! with(new \App\Foundations\Pagination\CustomerSimplePresenter($categories))->render() !!}

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