mirror of
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254 lines
6.8 KiB
Go
254 lines
6.8 KiB
Go
// Copyright 2018 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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// Package gpage provides useful paging functionality for web pages.
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package gpage
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import (
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"fmt"
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"math"
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"net/url"
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"strings"
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"github.com/gogf/gf/net/ghttp"
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"github.com/gogf/gf/text/gregex"
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"github.com/gogf/gf/text/gstr"
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"github.com/gogf/gf/util/gconv"
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)
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// Page is the pagination implementer.
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type Page struct {
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UrlTemplate string // Custom url template for page url producing.
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TotalSize int // Total size.
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TotalPage int // Total page, which is automatically calculated.
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CurrentPage int // Current page number >= 1.
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PageName string // Page variable name. It's "page" in default.
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NextPageTag string // Tag name for next p.
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PrevPageTag string // Tag name for prev p.
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FirstPageTag string // Tag name for first p.
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LastPageTag string // Tag name for last p.
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PrevBar string // Tag string for prev bar.
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NextBar string // Tag string for next bar.
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PageBarNum int // Page bar number for displaying.
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AjaxActionName string // Ajax function name. Ajax is enabled if this attribute is not empty.
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}
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// 创建一个分页对象，输入参数分别为：
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// 总数量、每页数量、当前页码、当前的URL(URI+QUERY)、(可选)路由规则(例如: /user/list/:page、/order/list/*page、/order/list/{page}.html)
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func New(totalSize, pageSize, currentPage int, urlTemplate string) *Page {
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p := &Page{
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PageName: "page",
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PrevPageTag: "<",
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NextPageTag: ">",
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FirstPageTag: "|<",
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LastPageTag: ">|",
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PrevBar: "<<",
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NextBar: ">>",
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TotalSize: totalSize,
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TotalPage: int(math.Ceil(float64(totalSize) / float64(pageSize))),
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CurrentPage: 1,
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PageBarNum: 10,
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UrlTemplate: urlTemplate,
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}
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if currentPage > 0 {
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p.CurrentPage = currentPage
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}
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return p
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}
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// 获取显示"下一页"的内容.
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func (p *Page) NextPage(styles ...string) string {
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var curStyle, style string
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if len(styles) > 0 {
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curStyle = styles[0]
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}
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if len(styles) > 1 {
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style = styles[0]
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}
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if p.CurrentPage < p.TotalPage {
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return p.GetLink(p.GetUrl(p.CurrentPage+1), p.NextPageTag, "下一页", style)
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}
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return fmt.Sprintf(`<span class="%s">%s</span>`, curStyle, p.NextPageTag)
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}
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// 获取显示“上一页”的内容
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func (p *Page) PrevPage(styles ...string) string {
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var curStyle, style string
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if len(styles) > 0 {
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curStyle = styles[0]
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}
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if len(styles) > 1 {
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style = styles[0]
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}
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if p.CurrentPage > 1 {
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return p.GetLink(p.GetUrl(p.CurrentPage-1), p.PrevPageTag, "上一页", style)
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}
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return fmt.Sprintf(`<span class="%s">%s</span>`, curStyle, p.PrevPageTag)
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}
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// 获取显示“首页”的代码
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func (p *Page) FirstPage(styles ...string) string {
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var curStyle, style string
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if len(styles) > 0 {
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curStyle = styles[0]
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}
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if len(styles) > 1 {
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style = styles[0]
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}
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if p.CurrentPage == 1 {
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return fmt.Sprintf(`<span class="%s">%s</span>`, curStyle, p.FirstPageTag)
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}
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return p.GetLink(p.GetUrl(1), p.FirstPageTag, "第一页", style)
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}
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// 获取显示“尾页”的内容
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func (p *Page) LastPage(styles ...string) string {
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var curStyle, style string
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if len(styles) > 0 {
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curStyle = styles[0]
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}
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if len(styles) > 1 {
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style = styles[0]
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}
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if p.CurrentPage == p.TotalPage {
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return fmt.Sprintf(`<span class="%s">%s</span>`, curStyle, p.LastPageTag)
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}
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return p.GetLink(p.GetUrl(p.TotalPage), p.LastPageTag, "最后页", style)
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}
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// 获得分页条列表内容
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func (p *Page) PageBar(styles ...string) string {
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var curStyle, style string
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if len(styles) > 0 {
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curStyle = styles[0]
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}
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if len(styles) > 1 {
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style = styles[0]
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}
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plus := int(math.Ceil(float64(p.PageBarNum / 2)))
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if p.PageBarNum-plus+p.CurrentPage > p.TotalPage {
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plus = p.PageBarNum - p.TotalPage + p.CurrentPage
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}
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begin := p.CurrentPage - plus + 1
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if begin < 1 {
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begin = 1
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}
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ret := ""
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for i := begin; i < begin+p.PageBarNum; i++ {
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if i <= p.TotalPage {
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if i != p.CurrentPage {
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ret += p.GetLink(p.GetUrl(i), gconv.String(i), style, "")
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} else {
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ret += fmt.Sprintf(`<span class="%s">%d</span>`, curStyle, i)
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}
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} else {
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break
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}
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}
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return ret
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}
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// 获取基于select标签的显示跳转按钮的代码
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func (p *Page) SelectBar() string {
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ret := `<select name="GPageSelect" onchange="window.location.href=this.value">`
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for i := 1; i <= p.TotalPage; i++ {
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if i == p.CurrentPage {
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ret += fmt.Sprintf(`<option value="%s" selected>%d</option>`, p.GetUrl(i), i)
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} else {
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ret += fmt.Sprintf(`<option value="%s">%d</option>`, p.GetUrl(i), i)
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}
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}
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ret += "</select>"
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return ret
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}
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// 预定义的分页显示风格内容
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func (p *Page) GetContent(mode int) string {
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switch mode {
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case 1:
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p.NextPageTag = "下一页"
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p.PrevPageTag = "上一页"
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return fmt.Sprintf(
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`%s <span class="current">%d</span> %s`,
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p.PrevPage(),
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p.CurrentPage,
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p.NextPage(),
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)
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case 2:
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p.NextPageTag = "下一页>>"
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p.PrevPageTag = "<<上一页"
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p.FirstPageTag = "首页"
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p.LastPageTag = "尾页"
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return fmt.Sprintf(
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`%s%s<span class="current">[第%d页]</span>%s%s第%s页`,
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p.FirstPage(),
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p.PrevPage(),
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p.CurrentPage,
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p.NextPage(),
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p.LastPage(),
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p.SelectBar(),
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)
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case 3:
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p.NextPageTag = "下一页"
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p.PrevPageTag = "上一页"
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p.FirstPageTag = "首页"
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p.LastPageTag = "尾页"
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pageStr := p.FirstPage()
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pageStr += p.PrevPage()
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pageStr += p.PageBar("current")
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pageStr += p.NextPage()
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pageStr += p.LastPage()
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pageStr += fmt.Sprintf(
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`<span>当前页%d/%d</span> <span>共%d条</span>`,
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p.CurrentPage,
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p.TotalPage,
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p.TotalSize,
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)
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return pageStr
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case 4:
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p.NextPageTag = "下一页"
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p.PrevPageTag = "上一页"
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p.FirstPageTag = "首页"
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p.LastPageTag = "尾页"
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pageStr := p.FirstPage()
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pageStr += p.PrevPage()
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pageStr += p.PageBar("current")
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pageStr += p.NextPage()
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pageStr += p.LastPage()
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return pageStr
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}
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return ""
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}
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// 为指定的页面返回地址值
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func (p *Page) GetUrl(pageNo int) string {
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pattern := fmt.Sprintf(`(:%s|\*%s|\.%s)`, p.PageName, p.PageName, p.PageName)
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result, _ := gregex.ReplaceString(pattern, pageNo, p.UrlTemplate)
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url.Path = gstr.Replace(p.UrlTemplate, "{.page}", gconv.String(pageNo))
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return url.String()
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}
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values := p.Url.Query()
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values.Set(p.PageName, gconv.String(pageNo))
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url.RawQuery = values.Encode()
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return url.String()
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}
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// 获取链接地址
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func (p *Page) GetLink(url, text, title, style string) string {
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if len(style) > 0 {
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style = fmt.Sprintf(`class="%s" `, style)
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}
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if len(p.AjaxActionName) > 0 {
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return fmt.Sprintf(`<a %shref='#' onclick="%s('%s')">%s</a>`, style, p.AjaxActionName, url, text)
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} else {
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return fmt.Sprintf(`<a %shref="%s" title="%s">%s</a>`, style, url, title, text)
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}
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}
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