响应式前端框架Bootstrap系列（11）分页

分页功能已经封装成一个独立的js文件，也是用bs完成的，名称为bootstrap-paginator.js。

使用前先导入文件 ：

演示代码：

分页

效果图：

 

 bootstrap-paginator.js文件源码：

(function($) {
"use strict";
/**
* Bootstrap分页构造函数
*
* @param 分页的容器对象
* @param 分页的相关配置
*
* */
var BootstrapPaginator = function(element, options) {
this.init(element, options);
},
old = null;

BootstrapPaginator.prototype = {

/**
* 分页初始化, 把element和options作为参数
*
* @param element 分页的容器对象
* @param options 分页的相关配置
*
* */
init: function(element, options) {

this.$element = $(element);

var version = (options && options.bootstrapMajorVersion) ? options.bootstrapMajorVersion : $.fn.bootstrapPaginator.defaults.bootstrapMajorVersion,
id = this.$element.attr("id");
if(version === 2 && !this.$element.is("div")) {
throw "在Bootstrap2中，必须使用div作为分页的容器";
} else if(version > 2 && !this.$element.is("ul")) {
throw "在Bootstrap3中，必须使用ul作为分页的容器"
}
this.currentPage = 1;
this.lastPage = 1;
this.setOptions(options);
this.initialized = true;
},

/**
* 更新分页element的属性
*
* @param 分页的相关配置
* */
setOptions: function(options) {

this.options = $.extend({}, (this.options || $.fn.bootstrapPaginator.defaults), options);

this.totalPages = parseInt(this.options.totalPages, 10); //设置总页数
this.numberOfPages = parseInt(this.options.numberOfPages, 10); //设置要显示的页数

//设置总页数后移除当前页设置，否则会导致页面异常
if(options && typeof(options.currentPage) !== 'undefined') {

this.setCurrentPage(options.currentPage);
}

this.listen();

//呈现分页
this.render();

if(!this.initialized && this.lastPage !== this.currentPage) {
this.$element.trigger("page-changed", [this.lastPage, this.currentPage]);
}

},

/**
* 设置时间监听器，如果可用的话，页面点击和切换事件是关联的
*
* */
listen: function() {

this.$element.off("page-clicked");

this.$element.off("page-changed"); // 卸载元素事件

if(typeof(this.options.onPageClicked) === "function") {
this.$element.bind("page-clicked", this.options.onPageClicked);
}

if(typeof(this.options.onPageChanged) === "function") {
this.$element.on("page-changed", this.options.onPageChanged);
}

this.$element.bind("page-clicked", this.onPageClicked);
},

/**
*
* 销毁paginator元素，首先卸载事件，然后清空里面的内容。
*
* */
destroy: function() {

this.$element.off("page-clicked");

this.$element.off("page-changed");

this.$element.removeData('bootstrapPaginator');

this.$element.empty();

},

/**
* 显示分页
*
* */
show: function(page) {

this.setCurrentPage(page);

this.render();

if(this.lastPage !== this.currentPage) {
this.$element.trigger("page-changed", [this.lastPage, this.currentPage]);
}
},

/**
* 显示下一页
*
* */
showNext: function() {
var pages = this.getPages();

if(pages.next) {
this.show(pages.next);
}

},

/**
* 显示上一页
*
* */
showPrevious: function() {
var pages = this.getPages();

if(pages.prev) {
this.show(pages.prev);
}

},

/**
* 显示第一页
*
* */
showFirst: function() {
var pages = this.getPages();

if(pages.first) {
this.show(pages.first);
}

},

/**
* 显示最后一页
*
* */
showLast: function() {
var pages = this.getPages();

if(pages.last) {
this.show(pages.last);
}

},

/**
* 页码单击处理程序，单击页码时，将当前页更改为相应的页面，并触发监听器的pageClick事件
*
*
* */
onPageItemClicked: function(event) {

var type = event.data.type,
page = event.data.page;

this.$element.trigger("page-clicked", [event, type, page]);

},
/**
* 点击跳转事件
* @param event
*/
onPageItemJumped: function(event) {
var type = event.data.type;
var value = this.$element.find('input').val();
var page = parseInt(value, 10);
if(!isNaN(value) && page > 0 && page != this.currentPage && page <= this.totalPages) {
this.$element.trigger("page-clicked", [event, type, page]);
}
},
onPageClicked: function(event, originalEvent, type, page) {
//显示相应页面，并在事件返回之前检查新建的页面
var currentTarget = $(event.currentTarget);
switch(type) {
case "first":
currentTarget.bootstrapPaginator("showFirst");
break;
case "prev":
currentTarget.bootstrapPaginator("showPrevious");
break;
case "next":
currentTarget.bootstrapPaginator("showNext");
break;
case "last":
currentTarget.bootstrapPaginator("showLast");
break;
case "page":
currentTarget.bootstrapPaginator("show", page);
break;
case "jump":
currentTarget.bootstrapPaginator("show", page);
break;
}
},
/**
* 根据内部属性和设置呈现分页（生成分页主函数，要修改分页的生成主要就在这里）
*
*
* */
render: function() {
//获取容器class并将其添加到容器中
var containerClass = this.getValueFromOption(this.options.containerClass, this.$element),
size = this.options.size || "normal",
alignment = this.options.alignment || "left",
pages = this.getPages(),
listContainer = this.options.bootstrapMajorVersion === 2 ? $("

") : this.$element,
listContainerClass = this.options.bootstrapMajorVersion === 2 ? this.getValueFromOption(this.options.listContainerClass, listContainer) : null,
first = null,
prev = null,
next = null,
last = null,
p = null,
i = 0;

this.$element.prop("class", "");

this.$element.addClass("pagination");

switch(size.toLowerCase()) {
case "large":
case "small":
case "mini":
this.$element.addClass($.fn.bootstrapPaginator.sizeArray[this.options.bootstrapMajorVersion][size.toLowerCase()]);
break;
default:
break;
}

if(this.options.bootstrapMajorVersion === 2) {
switch(alignment.toLowerCase()) {
case "center":
this.$element.addClass("pagination-centered");
break;
case "right":
this.$element.addClass("pagination-right");
break;
default:
break;
}
}

this.$element.addClass(containerClass);

//清空最外面的容器，然后把列表添加进容器中。
this.$element.empty();

if(this.options.bootstrapMajorVersion === 2) {
this.$element.append(listContainer);

listContainer.addClass(listContainerClass);
}

//更新页面元素引用
this.pageRef = [];

if(pages.first) { //如果是第1页
first = this.buildPageItem("first", pages.first);
if(first) {
listContainer.append(first);
}

}

if(pages.prev) { //如果是上一页
prev = this.buildPageItem("prev", pages.prev);
if(prev) {
listContainer.append(prev);
}

}

for(i = 0; i < pages.length; i = i + 1) { //填写数字
p = this.buildPageItem("page", pages[i]);
if(p) {
listContainer.append(p);
}
}
if(pages.next) { //如果是下一页
next = this.buildPageItem("next", pages.next);
if(next) {
listContainer.append(next);
}
}
if(pages.last) { //如果是最后一页
last = this.buildPageItem("last", pages.last);
if(last) {
listContainer.append(last);
}
}
//新加的
var itemCustom = $("

"); //创建一个容器
var itemHtml = " / " + this.totalPages + "";
itemCustom.append(itemHtml);
listContainer.append(itemCustom);
var itemlast = $("

"); //创建一个‘跳转’的span
var itemTz = $("跳转").on("click", null, {
type: 'jump'
}, $.proxy(this.onPageItemJumped, this)); //绑定点击事件
itemlast.append(itemTz);
listContainer.append(itemlast);
},

/**
*
* 根据给定的类型和页码创建page
*
* @param page 页码
* @param type 类型（first, prev, page, next, last）
*
* @return 构造的页面元素
* */
buildPageItem: function(type, page) {
var itemContainer = $("

"), //创建一个容器
itemContent = $(""), //创建一个内容
text = "",
title = "",
itemContainerClass = this.options.itemContainerClass(type, page, this.currentPage),
itemContentClass = this.getValueFromOption(this.options.itemContentClass, type, page, this.currentPage),
tooltipOpts = null;

switch(type) {
case "first":
itemContainerClass = "";
if(!this.getValueFromOption(this.options.shouldShowPage, type, page, this.currentPage)) {
return;
}
text = this.options.itemTexts(type, page, this.currentPage);
title = this.options.tooltipTitles(type, page, this.currentPage);
break;
case "last":
itemContainerClass = "";
if(!this.getValueFromOption(this.options.shouldShowPage, type, page, this.currentPage)) {
return;
}
text = this.options.itemTexts(type, page, this.currentPage);
title = this.options.tooltipTitles(type, page, this.currentPage);
break;
case "prev":
itemContainerClass = "";
if(!this.getValueFromOption(this.options.shouldShowPage, type, page, this.currentPage)) {
return;
}
text = this.options.itemTexts(type, page, this.currentPage);
title = this.options.tooltipTitles(type, page, this.currentPage);
break;
case "next":
itemContainerClass = "";
if(!this.getValueFromOption(this.options.shouldShowPage, type, page, this.currentPage)) {
return;
}
text = this.options.itemTexts(type, page, this.currentPage);
title = this.options.tooltipTitles(type, page, this.currentPage);
break;
case "page":
if(!this.getValueFromOption(this.options.shouldShowPage, type, page, this.currentPage)) {
return;
}
text = this.options.itemTexts(type, page, this.currentPage);
title = this.options.tooltipTitles(type, page, this.currentPage);
break;
}

itemContainer.addClass(itemContainerClass).append(itemContent);

itemContent.addClass(itemContentClass).html(text).on("click", null, {
type: type,
page: page
}, $.proxy(this.onPageItemClicked, this));

if(this.options.pageUrl) {
itemContent.attr("href", this.getValueFromOption(this.options.pageUrl, type, page, this.currentPage));
}

if(this.options.useBootstrapTooltip) {
tooltipOpts = $.extend({}, this.options.bootstrapTooltipOptions, {
title: title
});
itemContent.tooltip(tooltipOpts);
} else {
itemContent.attr("title", title);
}
return itemContainer;
},

setCurrentPage: function(page) {
if(page > this.totalPages || page < 1) { // 如果当前页码超出范围，则抛出异常
throw "页码超出范围";
}
this.lastPage = this.currentPage;
this.currentPage = parseInt(page, 10);
},
/**
* 获取表示页面对象当前状态的数组。
*
* @return 输出具有first, prev, next, last和中间页码的对象.
* */
getPages: function() {
var totalPages = this.totalPages, //通过总记录获取或计算总页数
pageStart = (this.currentPage % this.numberOfPages === 0) ? (parseInt(this.currentPage / this.numberOfPages, 10) - 1) * this.numberOfPages + 1 : parseInt(this.currentPage / this.numberOfPages, 10) * this.numberOfPages + 1, //calculates the start page.
output = [],
i = 0,
counter = 0;
pageStart = pageStart < 1 ? 1 : pageStart; //检查页面的开始范围，看它是否小于1。
for(i = pageStart, counter = 0; counter < this.numberOfPages && i <= totalPages; i = i + 1, counter = counter + 1) { //填写页面
output.push(i);
}
output.first = 1; //在当前页面离开第一页时添加first
if(this.currentPage > 1) { // 在当前页面离开第一页时添加prev
output.prev = this.currentPage - 1;
} else {
output.prev = 1;
}

if(this.currentPage < totalPages) { // 当前页不是最后一页时添加next
output.next = this.currentPage + 1;
} else {
output.next = totalPages;
}
output.last = totalPages; // 在当前页面没有达到最后一页时添加last
output.current = this.currentPage; //标记当前页面
output.total = totalPages;
output.numberOfPages = this.options.numberOfPages;
return output;
},
/**
* 从选项中获取值，这是为了处理其中value是函数的返回值的情况。
*
* @return 混合值取决于参数的类型，如果给定参数是函数，则返回评估结果。 否则参数本身将返回。
* */
getValueFromOption: function(value) {
var output = null,
args = Array.prototype.slice.call(arguments, 1);
if(typeof value === 'function') {
output = value.apply(this, args);
} else {
output = value;
}
return output;
}
};
old = $.fn.bootstrapPaginator;
$.fn.bootstrapPaginator = function(option) {
var args = arguments,
result = null;
$(this).each(function(index, item) {
var $this = $(item),
data = $this.data('bootstrapPaginator'),
options = (typeof option !== 'object') ? null : option;
if(!data) {
data = new BootstrapPaginator(this, options);
$this = $(data.$element);
$this.data('bootstrapPaginator', data);
return;
}
if(typeof option === 'string') {
if(data[option]) {
result = data[option].apply(data, Array.prototype.slice.call(args, 1));
} else {
throw "Method " + option + " does not exist";
}
} else {
result = data.setOptions(option);
}
});
return result;
};
$.fn.bootstrapPaginator.sizeArray = {
"2": {
"large": "pagination-large",
"small": "pagination-small",
"mini": "pagination-mini"
},
"3": {
"large": "pagination-lg",
"small": "pagination-sm",
"mini": ""
}
};
$.fn.bootstrapPaginator.defaults = {
containerClass: "",
size: "normal",
alignment: "left",
bootstrapMajorVersion: 2,
listContainerClass: "",
itemContainerClass: function(type, page, current) {
return(page === current) ? "active" : "";
},
itemContentClass: function(type, page, current) {
return "";
},
currentPage: 1,
numberOfPages: 5,
totalPages: 1,
pageUrl: function(type, page, current) {
return null;
},
onPageClicked: null,
onPageChanged: null,
useBootstrapTooltip: false,
shouldShowPage: function(type, page, current) {
var result = true;
switch(type) {
case "first":
result = (current !== 1);
break;
case "prev":
result = (current !== 1);
break;
case "next":
result = (current !== this.totalPages);
break;
case "last":
result = (current !== this.totalPages);
break;
case "page":
result = true;
break;
}
return result;
},
itemTexts: function(type, page, current) {
switch(type) {
case "first":
return "首页";
case "prev":
return "上一页";
case "next":
return "下一页";
case "last":
return "末页";
case "page":
return page;
}
},
tooltipTitles: function(type, page, current) {
switch(type) {
case "first":
return "首页";
case "prev":
return "上一页";
case "next":
return "下一页";
case "last":
return "末页";
case "page":
return(page === current) ? "当前是第" + page + "页" : "第" + page + "页";
}
},
bootstrapTooltipOptions: {
animation: true,
html: true,
placement: 'top',
selector: false,
title: "",
container: false
}
};
$.fn.bootstrapPaginator.Constructor = BootstrapPaginator;
}(window.jQuery));