121 lines
2.6 KiB
Go
121 lines
2.6 KiB
Go
/*
|
|
* @Author: haodaquan
|
|
* @Date: 2017-06-21 13:10:05
|
|
* @Last Modified by: haodaquan
|
|
* @Last Modified time: 2017-06-21 13:10:15
|
|
*/
|
|
|
|
package libs
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"math"
|
|
"strings"
|
|
)
|
|
|
|
type Pager struct {
|
|
Page int
|
|
Totalnum int
|
|
Pagesize int
|
|
urlpath string
|
|
urlquery string
|
|
nopath bool
|
|
}
|
|
|
|
func NewPager(page, totalnum, pagesize int, url string, nopath ...bool) *Pager {
|
|
p := new(Pager)
|
|
p.Page = page
|
|
p.Totalnum = totalnum
|
|
p.Pagesize = pagesize
|
|
|
|
arr := strings.Split(url, "?")
|
|
p.urlpath = arr[0]
|
|
if len(arr) > 1 {
|
|
p.urlquery = "?" + arr[1]
|
|
} else {
|
|
p.urlquery = ""
|
|
}
|
|
|
|
if len(nopath) > 0 {
|
|
p.nopath = nopath[0]
|
|
} else {
|
|
p.nopath = false
|
|
}
|
|
|
|
return p
|
|
}
|
|
|
|
func (this *Pager) url(page int) string {
|
|
if this.nopath { //不使用目录形式
|
|
if this.urlquery != "" {
|
|
return fmt.Sprintf("%s%s&page=%d", this.urlpath, this.urlquery, page)
|
|
} else {
|
|
return fmt.Sprintf("%s?page=%d", this.urlpath, page)
|
|
}
|
|
} else {
|
|
return fmt.Sprintf("%s/page/%d%s", this.urlpath, page, this.urlquery)
|
|
}
|
|
}
|
|
|
|
func (this *Pager) ToString() string {
|
|
if this.Totalnum <= this.Pagesize {
|
|
return ""
|
|
}
|
|
|
|
var buf bytes.Buffer
|
|
var from, to, linknum, offset, totalpage int
|
|
|
|
offset = 5
|
|
linknum = 10
|
|
|
|
totalpage = int(math.Ceil(float64(this.Totalnum) / float64(this.Pagesize)))
|
|
|
|
if totalpage < linknum {
|
|
from = 1
|
|
to = totalpage
|
|
} else {
|
|
from = this.Page - offset
|
|
to = from + linknum
|
|
if from < 1 {
|
|
from = 1
|
|
to = from + linknum - 1
|
|
} else if to > totalpage {
|
|
to = totalpage
|
|
from = totalpage - linknum + 1
|
|
}
|
|
}
|
|
|
|
buf.WriteString("<ul class=\"pagination\">")
|
|
if this.Page > 1 {
|
|
buf.WriteString(fmt.Sprintf("<li><a href=\"%s\">«</a></li>", this.url(this.Page-1)))
|
|
} else {
|
|
buf.WriteString("<li class=\"disabled\"><a href=\"#\" aria-label=\"Previous\"><span aria-hidden=\"true\">«</span></a></li>")
|
|
}
|
|
|
|
if this.Page > linknum {
|
|
buf.WriteString(fmt.Sprintf("<li><a href=\"%s\">1...</a></li>", this.url(1)))
|
|
}
|
|
|
|
for i := from; i <= to; i++ {
|
|
if i == this.Page {
|
|
buf.WriteString(fmt.Sprintf("<li class=\"active\"><a href=\"#\">%d</a></li>", i))
|
|
} else {
|
|
buf.WriteString(fmt.Sprintf("<li><a href=\"%s\">%d</a></li>", this.url(i), i))
|
|
}
|
|
}
|
|
|
|
if totalpage > to {
|
|
buf.WriteString(fmt.Sprintf("<li><a href=\"%s\">...%d</a></li>", this.url(totalpage), totalpage))
|
|
}
|
|
|
|
if this.Page < totalpage {
|
|
buf.WriteString(fmt.Sprintf("<li><a href=\"%s\">»</a></li>", this.url(this.Page+1)))
|
|
} else {
|
|
buf.WriteString(fmt.Sprintf("<li class=\"disabled\"><a href=\"#\" aria-label=\"Next\"><span aria-hidden=\"true\">»</span></a></li>"))
|
|
}
|
|
buf.WriteString("</ul>")
|
|
|
|
return buf.String()
|
|
}
|