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227 lines
6.7 KiB
PHP
Executable File
227 lines
6.7 KiB
PHP
Executable File
<?php
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class LtPagination
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{
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public $configHandle;
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public $conf;
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public function __construct()
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{
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if (! $this->configHandle instanceof LtConfig)
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{
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if (class_exists("LtObjectUtil", false))
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{
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$this->configHandle = LtObjectUtil::singleton("LtConfig");
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}
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else
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{
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$this->configHandle = new LtConfig;
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}
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}
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}
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public function init()
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{
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$this->conf = $this->configHandle->get("pagination.pager");
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if (empty($this->conf))
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{
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$this->conf['per_page'] = 25; //每个页面中希望展示的项目数量
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$this->conf['num_links_show'] = 9; //数字链接显示数量
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$this->conf['num_point_start_end'] = 2; //“点”前边和后边的链接数量
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$this->conf['show_first'] = true;
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$this->conf['show_prev'] = true;
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$this->conf['show_next'] = true;
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$this->conf['show_last'] = true;
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$this->conf['show_goto'] = false;
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$this->conf['show_info'] = false;
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$this->conf['show_point'] = true;
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$this->conf['show_empty_button'] = false;
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$this->conf['first_text'] = 'First';
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$this->conf['prev_text'] = 'Prev';
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$this->conf['next_text'] = 'Next';
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$this->conf['last_text'] = 'Last';
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$this->conf['point_text'] = '...';
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$this->conf['full_tag_open'] = '<div class="pages">';
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$this->conf['full_tag_close'] = '</div>';
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$this->conf['num_tag_open'] = '';
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$this->conf['num_tag_close'] = '';
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$this->conf['link_tag_open'] = '<a href=":url">';
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$this->conf['link_tag_close'] = '</a>';
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$this->conf['link_tag_cur_open'] = '<strong>';
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$this->conf['link_tag_cur_close'] = '</strong>';
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$this->conf['button_tag_open'] = '<a href=":url" style="font-weight:bold">';
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$this->conf['button_tag_close'] = '</a>';
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$this->conf['button_tag_empty_open'] = '<span>';
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$this->conf['button_tag_empty_close'] = '</span>';
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$this->conf['point_tag_open'] = '<span>';
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$this->conf['point_tag_close'] = '</span>';
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}
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}
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/**
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*
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* @param $page int 当前页
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* @param $count int 这个数值是你查询数据库得到的数据总量
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* @param $url string 字串中使用 :page 表示页参数 不在意位置 如/a/:page/c/e
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*/
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public function pager($page, $count, $url)
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{
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$per_page = empty($this->conf['per_page']) ? 25 : $this->conf['per_page'];
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$pagecount = ceil($count / $per_page);
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$pager = $this->renderPager($page, $pagecount, $url);
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if ($this->conf['show_goto'])
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{
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$pager .= $this->renderButton('goto', $page, $pagecount, $url);
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}
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if ($this->conf['show_info'])
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{
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$pager .= $this->renderButton('info', $page, $pagecount, $url);
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}
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return $this->conf['full_tag_open'] . $pager . $this->conf['full_tag_close'];
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}
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/**
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*
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* @param $pagenumber int 当前页
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* @param $pagecount int 总页数
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* @return string
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*/
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public function renderPager($pagenumber, $pagecount, $baseurl = '?page=:page')
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{
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$baseurl = urldecode($baseurl);
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$pager = $this->conf['num_tag_open'];
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$pager .= $this->renderButton('first', $pagenumber, $pagecount, $baseurl);
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$pager .= $this->renderButton('prev', $pagenumber, $pagecount, $baseurl);
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$startPoint = 1;
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$endPoint = $this->conf['num_links_show'];
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$num_links = ceil($this->conf['num_links_show'] / 2) - 1;
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if ($pagenumber > $num_links)
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{
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$startPoint = $pagenumber - $num_links;
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$endPoint = $pagenumber + $num_links;
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}
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if ($endPoint > $pagecount)
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{
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$startPoint = $pagecount + 1 - $this->conf['num_links_show'];
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$endPoint = $pagecount;
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}
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if ($startPoint < 1)
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{
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$startPoint = 1;
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}
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$currentButton = '';
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if ($this->conf['show_point'])
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{
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for($page = 1; $page < $startPoint; $page++)
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{
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$url = str_replace(':page', $page, $baseurl);
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if ($page > $this->conf['num_point_start_end'])
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{
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$currentButton .= $this->conf['point_tag_open'] . $this->conf['point_text'] . $this->conf['point_tag_close'];
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break;
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}
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$currentButton .= str_replace(':url', $url, $this->conf['link_tag_open']) . $page . $this->conf['link_tag_close'];
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}
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}
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for ($page = $startPoint; $page <= $endPoint; $page++)
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{
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$url = str_replace(':page', $page, $baseurl);
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if ($page == $pagenumber)
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{
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$currentButton .= $this->conf['link_tag_cur_open'] . $page . $this->conf['link_tag_cur_close'];
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}
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else
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{
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$currentButton .= str_replace(':url', $url, $this->conf['link_tag_open']) . $page . $this->conf['link_tag_close'];
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}
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}
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if ($this->conf['show_point'])
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{
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$page = $pagecount - $this->conf['num_point_start_end'];
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if ($page > $endPoint)
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{
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$currentButton .= $this->conf['point_tag_open'] . $this->conf['point_text'] . $this->conf['point_tag_close'];
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}
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for($page += 1; $page >= $endPoint && $page <= $pagecount; $page++)
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{
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if ($page == $endPoint) continue;
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$url = str_replace(':page', $page, $baseurl);
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$currentButton .= str_replace(':url', $url, $this->conf['link_tag_open']) . $page . $this->conf['link_tag_close'];
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}
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}
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$pager .= $currentButton;
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$pager .= $this->renderButton('next', $pagenumber, $pagecount, $baseurl);
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$pager .= $this->renderButton('last', $pagenumber, $pagecount, $baseurl);
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$pager .= $this->conf['num_tag_close'];
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return $pager;
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}
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/**
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*
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* @param $buttonLabel string 显示文字
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* @param $pagenumber int 当前页
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* @param $pagecount int 总页数
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* @return string
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*/
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public function renderButton($buttonLabel, $pagenumber, $pagecount, $baseurl = '?page=:page')
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{
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$baseurl = urldecode($baseurl);
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$destPage = 1;
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if ('goto' == $buttonLabel)
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{
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$button = "goto <input type=\"text\" size=\"3\" onkeydown=\"javascript: if(event.keyCode==13){ location='{$baseurl}'.replace(':page',this.value);return false;}\" />";
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return $button;
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}
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if ('info' == $buttonLabel)
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{
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$button = " $pagenumber/$pagecount ";
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return $button;
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}
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switch ($buttonLabel)
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{
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case "first":
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$destPage = 1;
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$bottenText = $this->conf['first_text'];
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break;
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case "prev":
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$destPage = $pagenumber - 1;
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$bottenText = $this->conf['prev_text'];
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break;
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case "next":
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$destPage = $pagenumber + 1;
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$bottenText = $this->conf['next_text'];
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break;
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case "last":
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$destPage = $pagecount;
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$bottenText = $this->conf['last_text'];
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break;
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}
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$url = str_replace(':page', $destPage, $baseurl);
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$button = str_replace(':url', $url, $this->conf['button_tag_open']) . $bottenText . $this->conf['button_tag_close'];
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if ($buttonLabel == "first" || $buttonLabel == "prev")
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{
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if ($pagenumber <= 1)
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{
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$button = $this->conf['show_empty_button'] ? $this->conf['button_tag_empty_open'] . $bottenText . $this->conf['button_tag_empty_close'] : '';
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}
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}
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else
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{
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if ($pagenumber >= $pagecount)
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{
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$button = $this->conf['show_empty_button'] ? $this->conf['button_tag_empty_open'] . $bottenText . $this->conf['button_tag_empty_close'] : '';
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}
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}
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return $button;
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}
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}
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