/*
** File: class.pagenumber.php
** Class: PageNumber
** Version: none
** Created: 5/12/2004
** Author: Morgan Woo
** Email: morgan.woo@163.com
** Update:huabing lv
** Email:hb_lv@hotmail.com
**
** Copyright (c) 2004 Mr.Woo . All rights reserved.
*/
class Pager{
//生成的页码（事实上不用也行）
var pageNumber='';

//需要分类的条目总数
var totalItems=0;
//数据连接相关
var conn;
var sql;
//每页显示几个条目
var itemsPerPage=3;

//总页数
var totalPageNumber=0;
//当前页码！
var currentPageNumber=1;

//一个页面显示几个页码
var length=10;


//需要分页的url
var url='';
function Pager(conn,sql,currentPageNumber,itemsPerPage,length,url){
this->currentPageNumber=currentPageNumber;
this->conn=conn;
this->sql=sql;
this->itemsPerPage=itemsPerPage;
this->length=length;
this->url=url;
this->url.=(stristr(this->url,'?')!=false)?'&':'?'; //Url里有"?"就加"&"没有就加"?"
this->getTotalPageNumber();
}
function getTotalItems(){
//for adodb
rs=this->conn->Execute(this->sql);
this->totalItems=rs->RecordCount();
return this->totalItems;
}
function getTotalPageNumber(){
this->totalPageNumber=ceil(this->getTotalItems()/this->itemsPerPage);
return this->totalPageNumber;
}

//SQL里 LIMIT start，length 中的起始值
function getLimitStart(){
start=(this->currentPageNumber-1)*this->itemsPerPage;
return start;
}
//SQL里 LIMIT start，length 中的length
function getLimitItems(){
return this->itemsPerPage;
}
function getRsPerPage(){
modiSQL=this->sql." limit ".this->getLimitStart()." ,".this->getLimitItems();
//偶用的是adodb的说
modiRS=this->conn->Execute(modiSQL);
arr=modiRS->GetArray();
return arr;
}

//主函数.中文分页
function getPageNumber(){
if (this->getTotalPageNumber()>1){

pageNumber='当前第'.this->currentPageNumber.'页/共'.this->totalPageNumber.'页';
//显示第一页和前一页
if (this->currentPageNumber>1){
//第一页
//First Page
pageNumber.="第一页 ";
//前一页
//Previous Page
pageNumber.="前一页 ";
}
//The start number is the first number of all pages which show on the current page.
startNumber=intval(this->currentPageNumber/this->length)*this->length;
//Prev N page
//交界处
if (this->currentPageNumber>=this->length){
pageNumber.="[".(startNumber-1)."]...";
}

leftPageNumber=0;
for (i=startNumber;i<=this->totalPageNumber;i++){
if (i==0)continue;
if (i-startNumberlength){
if (i==this->currentPageNumber){
pageNumber.="[i]";
}else{
pageNumber.="[".i."]";
}
}else{
leftPageNumber=this->totalPageNumber-i+1;
break;
}
}
//显示下一个分页列表
if (leftPageNumber>=1){
pageNumber.="...[".(startNumber+this->length)."] ";
}

if (this->currentPageNumber!=this->totalPageNumber){
//Next page
pageNumber.="下一页 ";
//Last page
pageNumber.="最后页 ";
}

this->pageNumber=pageNumber;
return this->pageNumber;

}


}


//英文分页
function getPageNumber2(){
if (this->getTotalPageNumber()>1){

pageNumber='P'.this->currentPageNumber.'/'.this->totalPageNumber.'';
//显示第一页和前一页
if (this->currentPageNumber>1){
//第一页
//First Page
pageNumber.="FIRST ";
//前一页
//Previous Page
pageNumber.="PREV ";
}
//The start number is the first number of all pages which show on the current page.
startNumber=intval(this->currentPageNumber/this->length)*this->length;
//Prev N page
//交界处
if (this->currentPageNumber>=this->length){
pageNumber.="[".(startNumber-1)."]...";
}

leftPageNumber=0;
for (i=startNumber;i<=this->totalPageNumber;i++){
if (i==0)continue;
if (i-startNumberlength){
if (i==this->currentPageNumber){
pageNumber.="[i]";
}else{
pageNumber.="[".i."]";
}
}else{
leftPageNumber=this->totalPageNumber-i+1;
break;
}
}
//显示下一个分页列表
if (leftPageNumber>=1){
pageNumber.="...[".(startNumber+this->length)."] ";
}

if (this->currentPageNumber!=this->totalPageNumber){
//Next page
pageNumber.="NEXT ";
//Last page
pageNumber.="LAST ";
}

this->pageNumber=pageNumber;
return this->pageNumber;

}


}

}
//currentPageNumber=( isset(_GET['page']) ) ? intval(_GET['page']) : 1;
//include("PAGENUMBER/class.pagenumber.php");
//pageNumber= new PageNumber(adodbConn,sql,currentPageNumber,10,3,3,"test.php");
//echo pageNumber->getPageNumber2();
//echo "
";
//echo pageNumber->getPageNumber();
?>