<?php



// +----------------------------------------------------------------------



// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]



// +----------------------------------------------------------------------



// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.



// +----------------------------------------------------------------------



// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )



// +----------------------------------------------------------------------



// | Author: 麦当苗儿 <zuojiazi@vip.qq.com> <http://www.zjzit.cn>



// +----------------------------------------------------------------------



namespace Think;







class Page{



    public $firstRow; // 起始行数



    public $listRows; // 列表每页显示行数



    public $parameter; // 分页跳转时要带的参数



    public $totalRows; // 总行数



    public $totalPages; // 分页总页面数



    public $rollPage   = 11;// 分页栏每页显示的页数



	public $lastSuffix = true; // 最后一页是否显示总页数







    private $p       = 'p'; //分页参数名



    private $url     = ''; //当前链接URL



    private $nowPage = 1;







	// 分页显示定制



    private $config  = array(



        'header' => '<span class="rows">共 %TOTAL_ROW% 条记录</span>',



        'prev'   => '上一页',



        'next'   => '下一页',



        'first'  => '首页',



        'last'   => '尾页',



        'theme'  => '%FIRST% %UP_PAGE% %LINK_PAGE% %DOWN_PAGE% %END%',



    );







    /**



     * 架构函数



     * @param array $totalRows  总的记录数



     * @param array $listRows  每页显示记录数



     * @param array $parameter  分页跳转的参数



     */



    public function __construct($totalRows, $listRows=20, $parameter = array()) {



        C('VAR_PAGE') && $this->p = C('VAR_PAGE'); //设置分页参数名称



        /* 基础设置 */



        $this->totalRows  = $totalRows; //设置总记录数



        $this->listRows   = $listRows;  //设置每页显示行数



        $this->parameter  = empty($parameter) ? $_GET : $parameter;



        $this->nowPage    = empty($_GET[$this->p]) ? 1 : intval($_GET[$this->p]);



        $this->nowPage    = $this->nowPage>0 ? $this->nowPage : 1;



        $this->firstRow   = $this->listRows * ($this->nowPage - 1);



    }







    /**



     * 定制分页链接设置



     * @param string $name  设置名称



     * @param string $value 设置值



     */



    public function setConfig($name,$value) {



        if(isset($this->config[$name])) {



            $this->config[$name] = $value;



        }



    }







    /**



     * 生成链接URL



     * @param  integer $page 页码



     * @return string



     */



    private function url($page){



        return str_replace(urlencode('[PAGE]'), $page, $this->url);



    }







    /**



     * 组装分页链接



     * @return string



     */



    public function show() {



        if(0 == $this->totalRows) return '';







        /* 生成URL */



        $this->parameter[$this->p] = '[PAGE]';



        $this->url = U(ACTION_NAME, $this->parameter);



        /* 计算分页信息 */



        $this->totalPages = ceil($this->totalRows / $this->listRows); //总页数



        if(!empty($this->totalPages) && $this->nowPage > $this->totalPages) {



            $this->nowPage = $this->totalPages;



        }







        /* 计算分页临时变量 */



        $now_cool_page      = $this->rollPage/2;



		$now_cool_page_ceil = ceil($now_cool_page);



		$this->lastSuffix && $this->config['last'] = $this->totalPages;







        //上一页



        $up_row  = $this->nowPage - 1;



        $up_page = $up_row > 0 ? '<a class="prev" href="' . $this->url($up_row) . '">' . $this->config['prev'] . '</a>' : '';







        //下一页



        $down_row  = $this->nowPage + 1;



        $down_page = ($down_row <= $this->totalPages) ? '<a class="next" href="' . $this->url($down_row) . '">' . $this->config['next'] . '</a>' : '';







        //第一页



        $the_first = '';



        if($this->totalPages > $this->rollPage && ($this->nowPage - $now_cool_page) >= 1){



            $the_first = '<a class="first" href="' . $this->url(1) . '">' . $this->config['first'] . '</a>';



        }







        //最后一页



        $the_end = '';



        if($this->totalPages > $this->rollPage && ($this->nowPage + $now_cool_page) < $this->totalPages){



            $the_end = '<a class="end" href="' . $this->url($this->totalPages) . '">' . $this->config['last'] . '</a>';



        }







        //数字连接



        $link_page = "";



        for($i = 1; $i <= $this->rollPage; $i++){



			if(($this->nowPage - $now_cool_page) <= 0 ){



				$page = $i;



			}elseif(($this->nowPage + $now_cool_page - 1) >= $this->totalPages){



				$page = $this->totalPages - $this->rollPage + $i;



			}else{



				$page = $this->nowPage - $now_cool_page_ceil + $i;



			}



            if($page > 0 && $page != $this->nowPage){







                if($page <= $this->totalPages){



                    $link_page .= '<a class="num" href="' . $this->url($page) . '">' . $page . '</a>';



                }else{



                    break;



                }



            }else{



                if($page > 0 && $this->totalPages != 1){



                    $link_page .= '<span class="current">' . $page . '</span>';



                }



            }



        }







        //替换分页内容



        $page_str = str_replace(



            array('%HEADER%', '%NOW_PAGE%', '%UP_PAGE%', '%DOWN_PAGE%', '%FIRST%', '%LINK_PAGE%', '%END%', '%TOTAL_ROW%', '%TOTAL_PAGE%'),



            array($this->config['header'], $this->nowPage, $up_page, $down_page, $the_first, $link_page, $the_end, $this->totalRows, $this->totalPages),



            $this->config['theme']);



        return "<div>{$page_str}</div>";



    }



}



