<?php


namespace paginate;

use think\Paginator;

class Layuipaginate extends Paginator
{  
  
    //首页  
    protected function home() {  
        if ($this->currentPage() > 1) {  
            return "<a href='" . $this->url(1) . "' title='首页'>首页</a>";  
        } else {  
            return "<p>首页</p>";  
        }  
    }  
  
    //上一页  
    protected function prev() {  
        if ($this->currentPage() > 1) {  
            return "<a href='" . $this->url($this->currentPage - 1) . "' title='上一页'>上一页</a>";  
        } else {  
            return "<p>上一页</p>";  
        }  
    }  
  
    //下一页  
    protected function next() {  
        if ($this->hasMore) {  
            return "<a href='" . $this->url($this->currentPage + 1) . "' title='下一页'>下一页</a>";  
        } else {  
            return"<p>下一页</p>";  
        }  
    }  
  
    //尾页  
    protected function last() {  
        if ($this->hasMore) {  
            return "<a href='" . $this->url($this->lastPage) . "' title='尾页'>尾页</a>";  
        } else {  
            return "<p>尾页</p>";  
        }  
    }  
  
    //统计信息  
    protected function info(){  
        return "<p class='pageRemark'>共<b>" . $this->lastPage .  
            "</b>页<b>" . $this->total . "</b>条数据</p>";  
    }  
  
    /** 
     * 页码按钮 
     * @return string 
     */  
    protected function getLinks()  
    {  
  
        $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(  
                    '%s<div class="pagination">%s %s %s</div>',  
                    $this->css(),  
                    $this->prev(),  
                    $this->getLinks(),  
                    $this->next()  
                );  
            } else {  
                return sprintf(  
                    '%s<div class="pagination">%s %s %s %s %s %s</div>',  
                    $this->css(),  
                    $this->home(),  
                    $this->prev(),  
                    $this->getLinks(),  
                    $this->next(),  
                    $this->last(),  
                    $this->info()  
                );  
            }  
        }  
    }  
  
    /** 
     * 生成一个可点击的按钮 
     * 
     * @param  string $url 
     * @param  int    $page 
     * @return string 
     */  
    protected function getAvailablePageWrapper($url, $page)  
    {  
        return '<a href="' . htmlentities($url) . '" title="第'. $page .'页" >' . $page . '</a>';
    }  
  
    /** 
     * 生成一个禁用的按钮 
     * 
     * @param  string $text 
     * @return string 
     */  
    protected function getDisabledTextWrapper($text)  
    {  
        return '<p class="pageEllipsis">' . $text . '</p>';  
    }  
  
    /** 
     * 生成一个激活的按钮 
     * 
     * @param  string $text 
     * @return string 
     */  
    protected function getActivePageWrapper($text)  
    {  
        return '<a href="" class="cur">' . $text . '</a>';  
    }  
  
    /** 
     * 生成省略号按钮 
     * 
     * @return string 
     */  
    protected function getDots()  
    {  
        return $this->getDisabledTextWrapper('...');  
    }  
  
    /** 
     * 批量生成页码按钮. 
     * 
     * @param  array $urls 
     * @return string 
     */  
    protected function getUrlLinks(array $urls)  
    {  
        $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  int    $page 
     * @return string 
     */  
    protected function getPageLinkWrapper($url, $page)  
    {  
        if ($page == $this->currentPage()) {  
            return $this->getActivePageWrapper($page);  
        }  
  
        return $this->getAvailablePageWrapper($url, $page);  
    }  
  
    /** 
     * 分页样式 
     */  
    protected function css(){  
        return '  <style type="text/css">  
            .pagination p{  
                margin:0;  
                cursor:pointer  
            }  
            .pagination{  
                height:40px;  
                padding:20px 0px;  
            }  
            .pagination a{  
                display:block;  
                float:left;  
                margin-right:10px;  
                padding:2px 12px;  
                height:24px;  
                border:1px #cccccc solid;  
                background:#fff;  
                text-decoration:none;  
                color:#808080;  
                font-size:12px;  
                line-height:24px;  
            }  
            .pagination a:hover{  
                color:#FF5722;  
                background: white;  
                border:1px #FF5722 solid;  
            }  
            .pagination a.cur{  
                border:1px #FF5722 solid;  
                background:#FF5722;  
                color:#fff;  
            }  
            .pagination p{  
                float:left;  
                padding:2px 12px;  
                font-size:12px;  
                height:24px;  
                line-height:24px;  
                color:#bbb;  
                border:1px #ccc solid;  
                background:#fcfcfc;  
                margin-right:8px;  
  
            }  
            .pagination p.pageRemark{  
                border-style:none;  
                background:none;  
                margin-right:0px;  
                padding:4px 0px;  
                color:#666;  
            }  
            .pagination p.pageRemark b{  
                color:red;  
            }  
            .pagination p.pageEllipsis{  
                border-style:none;  
                background:none;  
                padding:3px 0px;  
                color:#808080;  
            }  
            .dates li {font-size: 14px;margin:20px 0}  
            .dates li span{float:right}  
        </style>';  
    }  
}  
