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tm.pagination.js
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tm.pagination.js
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/**
* name: tm.pagination
* Version: 1.0.0 beta
*/
angular.module('minecarft', []).directive('tmPagination',[function(){
return {
restrict: 'EA',
template: '<div class="page-list">' +
'<ul class="pagination" ng-show="conf.totalItems > 0">' +
'<li ng-class="{disabled: conf.currentPage == 1}" ng-click="prevPage()"><span>«</span></li>' +
'<li ng-repeat="item in pageList track by $index" ng-class="{active: item == conf.currentPage, separate: item == \'...\'}" ' +
'ng-click="changeCurrentPage(item)">' +
'<span>{{ item }}</span>' +
'</li>' +
'<li ng-class="{disabled: conf.currentPage == conf.numberOfPages}" ng-click="nextPage()"><span>»</span></li>' +
'</ul>' +
'<div class="page-total" ng-show="conf.totalItems > 0">' +
'每页<select ng-model="conf.itemsPerPage" ng-options="option for option in conf.perPageOptions " ng-change="changeItemsPerPage()"></select>' +
'/共<strong>{{ conf.totalItems }}</strong>条 ' +
'跳转至<input type="text" ng-model="jumpPageNum" ng-keyup="jumpPageKeyUp($event)"/>' +
'</div>' +
'<div class="no-items" ng-show="conf.totalItems <= 0">暂无数据</div>' +
'</div>',
replace: true,
scope: {
conf: '='
},
link: function(scope, element, attrs) {
var conf = scope.conf;
// 默认分页长度
var defaultPagesLength = 9;
// 默认分页选项可调整每页显示的条数
var defaultPerPageOptions = [10, 15, 20, 30, 50];
// 默认每页的个数
var defaultPerPage = 15;
// 获取分页长度
if(conf.pagesLength) {
// 判断一下分页长度
conf.pagesLength = parseInt(conf.pagesLength, 10);
if(!conf.pagesLength) {
conf.pagesLength = defaultPagesLength;
}
// 分页长度必须为奇数，如果传偶数时，自动处理
if(conf.pagesLength % 2 === 0) {
conf.pagesLength += 1;
}
} else {
conf.pagesLength = defaultPagesLength
}
// 分页选项可调整每页显示的条数
if(!conf.perPageOptions){
conf.perPageOptions = defaultPagesLength;
}
// pageList数组
function getPagination(newValue, oldValue) {
// conf.currentPage
if(conf.currentPage) {
conf.currentPage = parseInt(scope.conf.currentPage, 10);
}
if(!conf.currentPage) {
conf.currentPage = 1;
}
// conf.totalItems
if(conf.totalItems) {
conf.totalItems = parseInt(conf.totalItems, 10);
}
// conf.totalItems
if(!conf.totalItems) {
conf.totalItems = 0;
return;
}
// conf.itemsPerPage
if(conf.itemsPerPage) {
conf.itemsPerPage = parseInt(conf.itemsPerPage, 10);
}
if(!conf.itemsPerPage) {
conf.itemsPerPage = defaultPerPage;
}
// numberOfPages
conf.numberOfPages = Math.ceil(conf.totalItems/conf.itemsPerPage);
// 如果分页总数>0，并且当前页大于分页总数
if(scope.conf.numberOfPages > 0 && scope.conf.currentPage > scope.conf.numberOfPages){
scope.conf.currentPage = scope.conf.numberOfPages;
}
// 如果itemsPerPage在不在perPageOptions数组中，就把itemsPerPage加入这个数组中
var perPageOptionsLength = scope.conf.perPageOptions.length;
// 定义状态
var perPageOptionsStatus;
for(var i = 0; i < perPageOptionsLength; i++){
if(conf.perPageOptions[i] == conf.itemsPerPage){
perPageOptionsStatus = true;
}
}
// 如果itemsPerPage在不在perPageOptions数组中，就把itemsPerPage加入这个数组中
if(!perPageOptionsStatus){
conf.perPageOptions.push(conf.itemsPerPage);
}
// 对选项进行sort
conf.perPageOptions.sort(function(a, b) {return a - b});
// 页码相关
scope.pageList = [];
if(conf.numberOfPages <= conf.pagesLength){
// 判断总页数如果小于等于分页的长度，若小于则直接显示
for(i =1; i <= conf.numberOfPages; i++){
scope.pageList.push(i);
}
}else{
// 总页数大于分页长度（此时分为三种情况：1.左边没有...2.右边没有...3.左右都有...）
// 计算中心偏移量
var offset = (conf.pagesLength - 1) / 2;
if(conf.currentPage <= offset){
// 左边没有...
for(i = 1; i <= offset + 1; i++){
scope.pageList.push(i);
}
scope.pageList.push('...');
scope.pageList.push(conf.numberOfPages);
}else if(conf.currentPage > conf.numberOfPages - offset){
scope.pageList.push(1);
scope.pageList.push('...');
for(i = offset + 1; i >= 1; i--){
scope.pageList.push(conf.numberOfPages - i);
}
scope.pageList.push(conf.numberOfPages);
}else{
// 最后一种情况，两边都有...
scope.pageList.push(1);
scope.pageList.push('...');
for(i = Math.ceil(offset / 2) ; i >= 1; i--){
scope.pageList.push(conf.currentPage - i);
}
scope.pageList.push(conf.currentPage);
for(i = 1; i <= offset / 2; i++){
scope.pageList.push(conf.currentPage + i);
}
scope.pageList.push('...');
scope.pageList.push(conf.numberOfPages);
}
}
scope.$parent.conf = conf;
}
// prevPage
scope.prevPage = function() {
if(conf.currentPage > 1){
conf.currentPage -= 1;
}
getPagination();
if(conf.onChange) {
conf.onChange();
}
};
// nextPage
scope.nextPage = function() {
if(conf.currentPage < conf.numberOfPages){
conf.currentPage += 1;
}
getPagination();
if(conf.onChange) {
conf.onChange();
}
};
// 变更当前页
scope.changeCurrentPage = function(item) {
if(item == '...'){
return;
}else{
conf.currentPage = item;
getPagination();
// conf.onChange()函数
if(conf.onChange) {
conf.onChange();
}
}
};
// 修改每页展示的条数
scope.changeItemsPerPage = function() {
// 一发展示条数变更，当前页将重置为1
conf.currentPage = 1;
getPagination();
// conf.onChange()函数
if(conf.onChange) {
conf.onChange();
}
};
// 跳转页
scope.jumpToPage = function() {
num = scope.jumpPageNum;
if(num.match(/\d+/)) {
num = parseInt(num, 10);
if(num && num != conf.currentPage) {
if(num > conf.numberOfPages) {
num = conf.numberOfPages;
}
// 跳转
conf.currentPage = num;
getPagination();
// conf.onChange()函数
if(conf.onChange) {
conf.onChange();
}
scope.jumpPageNum = '';
}
}
};
scope.jumpPageKeyUp = function(e) {
var keycode = window.event ? e.keyCode :e.which;
if(keycode == 13) {
scope.jumpToPage();
}
}
scope.$watch('conf.totalItems', function(value, oldValue) {
// 在无值或值相等的时候，去执行onChange事件
if(!value || value == oldValue) {
if(conf.onChange) {
conf.onChange();
}
}
getPagination();
})
}
};
}]);