jBootstrapPage修改可以返回第一页<<和>>最后一页问题
问题：jBootstrapPage默认<<和>>返回的是上一页和下一页，需要要求返回第一页和最后一页
修改jBootstrapPage.js
1.添加c.maxPages<=1只有页面小于等1时默认下一页和>>默认是禁用状态if(c.maxPageButton > c.maxPages && c.maxPages<=1) {
function init() {
$this.find('li').remove();
c.maxPages = Math.ceil(c.total/c.pageSize);
if(c.maxPages < 1) return;
$this.append('<li class="disabled"><a class="first" href="#">«</a></li>');
$this.append('<li class="disabled"><a class="pre" href="#">上一页</a></li>');
var pageCount = c.maxPages < c.maxPageButton ? c.maxPages : c.maxPageButton;
var pNum = 0;
for(var index = 1; index <= pageCount; index++) {
pNum++;
$this.append('<li class="page" pNum="'+pNum+'"><a href="#" page="'+index+'">'+index+'</a></li>');
}
$this.append('<li class="disabled"><a class="next" href="#">下一页</a></li>');
$this.append('<li><a class="last" href="#">»</a></li>');
if(c.maxPageButton > c.maxPages && c.maxPages<=1) {
$this.find('li a.next').parent().addClass("disabled");
$this.find('li a.last').parent().addClass("disabled");
}else {
$this.find('li a.next').parent().removeClass("disabled");
$this.find('li a.last').parent().removeClass("disabled");
}
$this.find('li:nth-child(3)').addClass('active');
firstBtn = $this.find('li a.first').parent();
preBtn = $this.find('li a.pre').parent();
lastBtn = $this.find('li a.last').parent();
nextBtn = $this.find('li a.next').parent();
}
2.拆分出<<和>>部分判断查看红色修改即可function onPageBtnClick($_this) {
var selectedText = $_this.text();
var selectedBtn = $this.find('li.active').find('a');
if(selectedText == '下一页') {
var selectedIndex = parseInt(selectedBtn.text());
var selectNum = parseInt($this.find('li.active').attr('pNum'))+1;
if(selectNum > c.maxPageButton) selectNum = c.maxPageButton-1;
if(selectedIndex > 0) {
mathNextPage(selectNum, selectedIndex, c.maxPages, c.maxPageButton);
selectedBtn = $this.find('li.page').find('a[page="'+(selectedIndex+1)+'"]');
}
}else if(selectedText == '»'){
var selectedIndex = c.maxPages;// parseInt(selectedBtn.text());
var selectNum = parseInt($this.find('li.active').attr('pNum'))+(c.maxPages-parseInt(selectedBtn.text()));//+1;
if(selectNum > c.maxPageButton) selectNum = c.maxPageButton-1;
if(selectedIndex > 0) {
mathNextPage(selectNum, selectedIndex, c.maxPages, c.maxPageButton);
selectedBtn = $this.find('li.page').find('a[page="'+selectedIndex+'"]'); //(selectedIndex+1)
}
}
else if(selectedText == '上一页') { // || selectedText == '«'
var selectedIndex = parseInt(selectedBtn.text())-1;
var selectNum = parseInt($this.find('li.active').attr('pNum'))-1;
if(selectNum < 1) selectNum = 1;
mathPrePage(selectNum, selectedIndex, c.maxPages, c.maxPageButton);
selectedBtn = $this.find('li.page').find('a[page="'+(selectedIndex)+'"]');
}
else if(selectedText == '«'){
var selectedIndex = 1;//parseInt(selectedBtn.text())-1;
var selectNum = parseInt($this.find('li.active').attr('pNum'))-(parseInt(selectedBtn.text())-1);//1;
if(selectNum < 1) selectNum = 1;
mathPrePage(selectNum, selectedIndex, c.maxPages, c.maxPageButton);
selectedBtn = $this.find('li.page').find('a[page="'+(selectedIndex)+'"]');
}
else {
selectedBtn = $_this;
}
onClickPage(selectedBtn);
}
3.上一页方法修改 查看红色修改即可function mathPrePage(currButtonNum, currPage, maxPage, showPage) {
if(maxPage < 1) return;
//选中的按钮大于中间数，就进一位
var middle = Math.ceil(showPage/2); // 4
// 4 > 3
// 5 - 4 + 3
//添加等于第一页时进入执行
if((currPage == 1 || currButtonNum != currPage) && currButtonNum < middle) { //currPage == 1 ||
$this.find('li.page').remove();
//1 2 3 4 5 6 7 8 9 10
//
var endPages = currPage + Math.floor(middle/2);
if(endPages < c.maxPageButton) endPages = c.maxPageButton+1;
//如何结束页大于最大显示页数则设置设置最大显示
if(c.maxPageButton > maxPage) endPages = maxPage;
var startPages = endPages - c.maxPageButton;
if(startPages <= 0)startPages = 1;
if(endPages - startPages >= c.maxPageButton) {
var d = endPages - startPages - c.maxPageButton;
if(d == 0) d = 1;
endPages -= d;
}
var pNum = 0;
var html = '';
for(var index = startPages; index <= endPages; index++) {
pNum++;
html += '<li class="page" pNum="'+pNum+'"><a href="#" page="'+index+'">'+index+'</a></li>';
}
$this.find('li:nth-child(2)').after(html);
bindPages();
}
}
3.下一页方法修改查看红色修改即可
function mathNextPage(currButtonNum, currPage, maxPage, showPage) {
if(maxPage < 1) return;
var offsetRight = 2;
//选中的按钮大于中间数，就进一位
var middle = showPage - 1; // 4
// 4 > 3
// 5 - 4 + 3
if((currButtonNum != currPage+1 || maxPage > showPage) && currButtonNum >= middle) {
//显示后面2个按钮
var startPages = currPage - offsetRight;
var endPages = currPage + middle;
endPages = endPages >= maxPage ? maxPage : endPages;
if(endPages <= c.maxPageButton) endPages = c.maxPageButton;
//结束页大于可显示的最大页则修改结束页等于可显示的最大页
if(c.maxPageButton > maxPage) endPages = maxPage;
if(endPages - startPages >= c.maxPageButton) {
var d = endPages - startPages - c.maxPageButton;
endPages -= d;
}
if(endPages == maxPage)endPages++;
if(endPages - startPages < c.maxPageButton) {
var d = c.maxPageButton - (endPages - startPages);
startPages -= d;
}
//小于等于默认显示1
if(startPages <= 0)startPages = 1;
var pNum = 0;
var html = '';
for(var index = startPages; index < endPages; index++) {
pNum++;
html += '<li class="page" pNum="'+pNum+'"><a href="#" page="'+index+'">'+index+'</a></li>';
}
$this.find('li.page').remove();
$this.find('li:nth-child(2)').after(html);
bindPages();
}